The Europa League returns this week with young stars and some well-known names seeking to make their mark. Here are some of the key players to look out for this season. Athletic Bilbao had to fight off interest from a host of clubs - including Barcelona and Arsenal - to keep the exciting winger.

Each of the 36 teams will compete in eight matches against different opponents, with four games played at home and four away. The outcomes of these matches will determine their positions in the league