The banned substances bethamethosone and methylprednisolone, both steroid related, were detected in a drugs test carried out after an Intertoto Cup match against Atletico Madrid on August 24.
Senna was suspended provisionally by UEFA on October 21 and the 60-day
Senna, 28, joined Villarreal from Sao Caetano in Brazil in 2002. He played only 25 games over his first two seasons in Spain but he had been ever-present for Villarreal until his suspension.