Barcelona and Manchester United played out a thrilling 2-2 draw in the first leg of their Europa League play-off tie on Thursday, while Juventus were left frustrated by Nantes in a 1-1 stalemate.The game at the Camp Nou brought together two European giants who met in two Champions League finals in 2009 and 2011, and who are both in excellent form domestically.After a goalless first half, La Liga leaders Barcelona went ahead five minutes into the second half thanks to a Marcos Alonso header at a corner.However, United drew level just three minutes later when Marcus Rashford beat Barcelona goalkeeper Marc-Andre ter Stegen at his near post to score a 13th goal in 15 games since the World Cup.