3) William Carvalho (Sporting Lisbon)
A defensive midfielder by trade, but the Portuguese international’s versatility could make him an appealing option for Arsene Wenger. Carvalho was strongly linked with a move to Arsenal last summer, but the switch never happened, as talkSPORT reports. The 22-year-old has enjoyed another season of development in Lisbon, and could now be ready to make the step up to the Premier League in 2015-16.