Will Buckley has admitted that he struggled to maintain his focus for Brighton in the second half of last season.
Ipswich manager Mick McCarthy has confirmed that Anthony Wordsworth is free to leave the club.
The 29-year-old France international, signed from Toulouse in 2009, played 25 games for Los Che last season, scoring twice.
Mathieu, while participating in the new season's kit launch, told valenciacf.com: "I am delighted to renew with Valencia, in this great club.
"I feel great and very happy to stay several more years in Valencia."