From Fate:

Entirely unknown nationwide is a high school student named Shino Ryuuji. At a national convention in his last year of junior high, he was allowed to go to a U-16 training camp as a Japanese representative candidate; that was to show a single part. In a friendly match against the U-17 Spain representative, Ryuuji was selected as one of the chosen to bathe in the severe baptism of the world! In the overwhelming reality, many soccer fans were fascinated by Japan's first-of-its-kind genuine story, the long-awaited serialization!

Heisuke just came into town and the first thing on his to do list is chasing pretty girls, which causes him to get punched in the process. After reaching the house he'll be staying at he sees a girl trying to sneek inside. Seeing this as a perfect opportunity to legitimately grope a girl, he attempts to stop this intruder only to find out that it's the same girl who punched him earlier, not only that but her name is Umi and she just happens to be one of the three sisters who live in that house along with their mother. The next day Umi finds out that Heisuke is a boxer who's skill is only eclipsed by his letcherousness.

From JShoujo Scans:

When Ageha was younger, she watched a tennis game and was affected by a passionate young tennis player. Years later she was determined to become the number one tennis player and to join the tennis club in her new high school.

After Kaiji's showdown with Chairman Hyoudou at the Starside Hotel, he's forced into labour at an underground mine. With his meagre daily wage, he'll be working for decades to repay his debt unless he does something about his miserable situation.

Kaiji decides to wager his earnings in an underground dice game for a ticket to get out of the mine for a limited period of time. But even if he surfaces, he only has one chance to win it big: by challenging the unbeatable pachinko machine nicknamed "The Bog."

The 2nd part of the Kaiji series.

1. Tobaku Mokushiroku Kaiji

2. Tobaku Hakairoku Kaiji

3. Tobaku Datenroku Kaiji

4. Tobaku Datenroku Kaiji - Kazuya Hen

5. Tobaku Datenroku Kaiji - One Poker Hen

Before the start of high school Sakamoto Maki meets Homare-senpai and falls in love at first sight. When he find out she will playing basketball at the same school, he becomes cold and tells her not to talk to him. Kouta of the newspaper club then informs her the boys and girls basketball teams hate each other and are forbidden from dating one another! In a hasty move, Maki confesses her feelings anyway and gets ignored. Just as she's about to give up, Homare announces to the two teams that they are dating?!

The second part of the 5 short stories in the volume work Kakattekinasai!

ILDA is one of the best basketball players. He even has his own cheering section. Tsubaki finds herself staring at him while she practices her shots. But her team is not any good, and if they don't find a way to win the next basketball game, their team might get canceled!

Junko Tachibana, a manager of the baseball club of Wakaba High School, is the Madonna of the team. Sawamura, her first love, is an ace batter.Happy and sound love story.

*Included in Aa! Seishun no Koushien

A Spin-off of Hitman Reborn.

From MangaScreener:
A professional baseball manga by Harold Sakuishi, the author of Beck.

Taiko Busujima is a powerful young pitcher looking to make it into the Japanese big leagues, but what he didn't count on was being signed to the Keihin Athletics, the cheapest and worst team in the league. Can he help turn the Athletics around and (gasp) win the pennant?

A gripping, edge-of-your-seat story loaded with Sakuishi's brand of wacky humor.

From Stage Storm:

Keimi is a student at a ballet school. Her sister Chiharu is a famous prima ballerina whose grace shows in every move and expression. How does it feel to be compared to a sister like this? In fact, the girl is very talented. She doesn't practice nearly as much as her classmates, yet her performance is always superb. She dances without any pretension because she has no knowledge of her gift...

Being the daughter of a dojo manager, Oosawa Masaki has been practicing nothing but karate. Her chance encounter with a certain young man sparks her interest in figure skating. Can a mannish Masaki transform into a sweet, lovely girl on the skating ring?

Kyosuke Kano has lived under the shadow of his successful brother Seisuke all his life who is a professional soccer player. Tired of being compared and downgraded at, he abandoned playing soccer until a boy from his new high school discovered him and asked him to join their team. Kyosuke joins it and befriends two other first year players named Rodrigo and Sakai with the dream of becoming professional soccer players themselves.

Satsuki met Kazuya once at local rink and he taught her jumping. Knowing what school Kazuya attends she aims to get there to meet him again. Will she meet him and get to skate with him again?

From Fujoshi Spirit:

Sekiya never really had a problem with his kyuudo club teammates. Until one day he overhears fellow club mate Nagashima saying that he doesn't approve of Sekiya.

Aggravated by it, neither of them can concentrate on archery practice, and so the cheerful club president Tatsumi-senpai tells them to become friends by holding hands on their way from school every day.

From Blissful Sin:

Taishou has complicated feelings toward another member of his high school swim team, Captain Kido Akiharu. A decent yet unimpressive swimmer, Taishou is often aggravated by Akiharu's calm and composed attitude. So, what is Taishou to do when Akiharu corners him in the locker room?!

1) Love mission
Tomoe Karuma is an up-and-coming mangaka whose supervisor is Ero Magazine’s Tanaka Atsuki. Though he imagined a cute girl named Tomoe, Tanaka is surprised to learn that in actual fact, Tomoe is a very geeky boy. Tomoe is a professional when it comes to creating sex scenes, but turns into a fish out of water when it comes to love. Tanaka offers to teach Tomoe all about love, but can the awkward mangaka learn about love in time to write about it? (From Blissful Sin)

2) Estranger!
Ichi fall in love in pro wrestling because he fall in love in the wrestler Hawk. He doesn't have the physique to be wrestler himself so he is training his body while he's acting as a manager slash servant to the demanding & childish Hawk.

3) Tasogare Bayside City
Chako was tired, hungry and bitten when he was picked up by Makoto and his father Yayoi like a stray cat, but will he become house·trained or will he go back to his old habits?

4) Sting & Slang
Koutaro met Neko in his sister's photographing class. The good looking model and the cute boy became good friends but is there more than that?

5) On a Slave
Kind and good hearted Kei could never ditch a friend in distress, that's his greatest virtue but also his Achilles' heel.

6) Just Us (Living Together)

7) Freetalk & Omake

Main chara is originally the Japanese country voted as a talented player red star hawk. After leaving national sports team for period of time, he joined the youth army once more for the world blue cup. Facing powerful enemy from various countries, how to overcome the difficulty and obtain the world blue cup?

From Jigoku:

Tomo's eyes chases after fellow teammate Tanji. He knows he has fallen for Tanji already but what comes with first love, makes him both expectant and scared of getting hurt.

Chap 4: Motto Furimuke yo Baby prequel
Seo falls for Kazuki within minutes but Kazuki hardly sees Seo as the love of his life. When Kazuki is kidnapped however, Seo shows Kazuki exactly how far he will go to save him, revealing how deep his love really is.

Ever since middle school, Suzuharu Sakudou has never won a competitive kendo match which makes him want to quit kendo in high school. But, he reluctantly keeps on doing kendo simply because he can't say no to his childhood friend, Chiko, and all of his senior in the kendo club. After hearing this from Chiko, Kiki Asahina, a retired kendoka who used to be the country 2nd best in the middle school level decide to beat some sense into him. However, Suzuharu actually defeats her. Amazed by his potential, she offer herself to coach him and entrust her dream to become number one in Japan to him.