The Frenchman agreed not to play in the loss to the 2.Bundesliga outfit as the transfer saga with Barcelona continues to rumble on
The Frenchman is embroiled in a transfer saga with Barcelona, who are keen on signing the player this summer, and agreed with his current club not to be used against the 2.Bundesliga outfit.
Andre Gomes made his debut for los Che but it was otherwise a disappointing encounter for the Spanish side, who were beaten by three goals scored within the space of five second-half minutes.
Jonathan Viera handed Valencia the lead on 50 minutes, drilling a shot across goal from inside the area for his third goal in pre-season so far.
However, their lead lasted just five minutes, as Slovenia international Jaukb Sylvestr finished from close range following a teasing cross from the right.
And Antonio-Mirko Colak transformed the game totally in the space of 60 seconds, scoring two well-placed efforts to establish a 3-1 lead on the hour mark.
Gomes came on for the final 20 minutes for the Liga side but it was not a happy encounter all round for new head coach Nuno Espirito Santo, who suffered his first defeat since replacing Juan Antonio Pizzi and must now contend with Mathieu's transfer wrangle in the coming days.