2009–10 was nothing short of disastrous for Tamudo, in sporting terms: again, he struggled with some injuries, was ostracised by manager and former teammate Mauricio Pochettino, who also deprived him of his captain armband during preseason, in favour of club youth graduate Daniel Jarque, and confronted the board of directors over contractual issues; his status was further diminished in the January transfer window, with the signing of another Argentine, Dani Osvaldo, and he eventually finished the campaign with only six league games and no goals.