On 1 May 2014, Mathieu looked to have scored the goal to send Valencia through to the 2014 UEFA Europa League Final when he scored off of Ricardo Costa's lay-off, making the score 3−0 against Sevilla (3−2 on aggregate) but Stéphane Mbia scored a 94th-minute header to win the semi-final on away goals for the Andalusian side. Three days later, Mathieu headed in a corner to send Valencia into a 1−0 lead at the Santiago Bernabéu but Real Madrid battled back to secure a 2−2 draw as Valencia conceded another late stoppage time goal.