#7 Gai Assulin
Gai Assulin is another player who has spent time at a couple of big European clubs, but things never worked out for him. At least not yet. He's still only 26, which means he could resurface on the big stage again. However, right now he is an enormously talented player who failed to reach his potential.
The Israeli attacking midfielder had a successful trial with Barcelona back in 2003 and worked his way up to the Barca B team. He also made his debut for the senior side in October 2009 in a cup game. However, he ended up leaving at the end of the season.
Assulin was a key player for Barca B when Pep Guardiola was still managing there. Once Pep got promoted, he had plans to bring Assulin with him and slowly introduced the skilful left-sided player to first-team action. But sadly Assulin missed most of 2008/09 through injury and it was all downhill since then.
In the summer of 2010, Assulin rejected a contract extension from Barcelona and left the club on mutual consent. He seemingly got a lifeline soon when he got snapped up by Manchester City, but things didn't work out in England either.
During his time at City, Assulin failed to make a single appearance. His only action in England came for the City reserve side and during a brief loan spell at Brighton in the Championship. He returned to Spain in 2012, signing for Racing Santander.
After a season back home in 2015/16, playing for Hapoel Tel Aviv, Assulin signed for Sabadell, a former Segunda team that's currently playing in the Segunda B.
Sadly for Assulin, his career seems to have hit a dead end. He also hasn't been involved in the Isreali setup after making his debut for the team as a 16-year-old. During his time at Barca, he had a conflict with the Isreali FA and thus he hasn't even been able to rack up some international caps to his name to stand out from all the players around Europe looking for contracts at top-flight clubs.