Definition: In this task, you will be presented with a passage and have to answer a question based on your understanding of the events inferred from the passage. Try to find the best answer that is most likely to fill in "_". Note that the URLs in the text have been replaced with [Link].
Input: Manchester United are ready to sell Victor Valdes after Louis van Gaal hit out at the goalkeeper's attitude by revealing he refused to play for the club's second string last season. But Valdes has hit back at the claims with a cryptic tweet showing all the games he had played in with the United youngsters and simply captioned it: '...? #Respect.' The 33-year-old was left off United's tour to USA and worked with club physios back at Carrington on Tuesday and Wednesday. Valencia and Turkish clubs are among those interested while United are considering free agent Sergio Romero as his possible replacement.Manchester United goalkeeper Victor Valdes appears to be heading for the Old Trafford exit doorRed Devils manager Louis van Gaal has revealed Valdes refused to play with second teamThe Dutchman claims Valdes has failed to follow his philosophy during his short spell with the clubValdes joined Manchester United on a free transfer in January after leaving Barcelona in 2014The Spaniard took to Twitter to refute the claims and showed which reserves games he'd played inClick HERE for all the latest news regarding Manchester United 
 Question:Valencia are among clubs in talks with Valdes' agent over a potential season-long loan move, with the goalkeeper's contract with _ set to expire next summer.

Manchester United