Ghana defender John Mensah will be out for three weeks after the injury he picked in Sunderland's defeat against West Brom on Saturday.Mensah suffered a grade two adductor tear 11 minutes into the match and will be sidelined for the rest of April.The Ghanaian international who is into his second season on loan at Sunderland has suffered a number of injuries but managed seven straight starts before his latest injury.But he could now miss games against Birmingham, Wigan and Fulham.Mensah has made 16 appearances third season and, when fit, has proved a key man for Steve Bruce's side.Sunderland could miss his presence at the back but with the club six points clear of the relegation zone and facing a nervous final six games before the season ends.Source: Michael Oti Adjei/Kickoff.com