Valencia boss Unai Emery believes that Juan Mata will now be staying with the club despite having doubts about his future recently.[LNB] Mata is a target for both Arsenal and Tottenham and looked at one stage to be on the verge of a move to Emirates Stadium.[LNB]However, that has not materialised and Emery is now confident of holding on to the Spain winger.[LNB]"Mata has gone through a process of doubts about his future," Emery said after seeing Mata captain his side in a 2-1 victory over Hamburg.[LNB]"But now we all believe he will stay at Valencia."