LONDON: Arsenal manager Unai Emery insisted his side's Europa League semi-final against Valencia is still "50-50" despite the Gunners taking a 3-1 first leg lead to Spain. Valencia's bright start at the Emirates on Thursday was rewarded with Mouctar Diakhaby's away goal. But Alexandre Lacazette quickly turned the game around with two goals in eight first-half minutes before Pierre-Emerick Aubameyang's late strike gave Arsenal a two-goal advantage to defend at the Mestalla on May 9. However, Emery, who managed Valencia between 2008 and 2012, knows the tie is far from over due to Arsenal's terrible away record this season. "It is a good result at home, but the second leg is going to be very difficult and maybe different. I consider for both teams it is 50-50," said Emery. "We can be proud of the players. It is not easy to be calm and come back with that result against this team." Arsenal are desperate not just for silverware in Emery's first season but the guarantee of Champions League qualification for next season that winning the Europa League would bring.