Atletico Madrid forwards Diego Costa and Kevin Gameiro are to miss Thursday's Europa League round-of-16 second leg at Lokomotiv Moscow through injury, but goalkeeper Jan Oblak has travelled to Russia despite being troubled by an ongoing glute issue.
Sunday afternoon's 3-0 La Liga win at home to Celta Vigo saw Gameiro pick up a hamstring problem during a substitute appearance, while Costa was taken off midway through the second half after he suffered a blow to his right ankle.
Atletico have confirmed that both forwards had undergone tests which confirmed a muscle strain for the France international, and just bruising for the Spain attacker.
"Medical tests on Gameiro have diagnosed a myofascial injury in the right adductor muscle, with the time out dependent on the recovery," a club statement said. "Diego Costa also underwent tests on the ankle injury suffered during the game, and fortunately it was just a strong bruising."
With Atletico 3-0 ahead from last Thursday's home first leg, both players have remained in Madrid. Oblak is included in the travelling squad, although back-up Axel Werner is again expected to deputise between the posts to allow the Slovenia international to recover from his recent minor issues.