Barcelona defender Dani Alves will have to rest for up to three weeks after injuring his right thigh muscle, the club said on Monday. The club said on its website that the Brazilian stretched his right femoral biceps in the team\'s 4-0 away win over Levante on Sunday. Alves is likely to miss a December 16 clash with Atletico Madrid, who are lying second in La Liga just three points behind leaders Barcelona