Villarreal midfielder Marcos Senna is likely to miss Wednesday's Champions League quarter-finals clash at Arsenal with a hamstring injury. Villarreal's official site stated that the Spain international, who superbly scored his side's only goal in last week's first-leg 1-1- draw with the Gunners, limped off the 2-0 Liga defeat to Malaga on Saturday. The Primera Liga outfit added that Senna will undergo further tests on Sunday, but conceded that the 32-year-old is unlikely to be fit for the midweek tie. Senna's injury comes as a blow for the Yellow Submarines, who already lost influential winger Santi Cazorla for the rest of the season with a broken leg. "Our injury problems are making life difficult," said manager Manuel Pellegrini.