Goalkeeper Petr Cech and defender John Terry, who both left the first leg of Chelsea's Champions League semifinal against Atletico Madrid with injuries, were at practice Tuesday as the Blues prepared for the sequel.
The keeper was knocked out less than 20 minutes into last week's scoreless draw in Madrid after suffering a dislocated shoulder, while Terry - Chelsea's captain - hobbled off in the 73rd minute with pain in his knee.
Terry and Cech were out of the lineup for last Sunday's crucial Premier League showdown with Liverpool, but the Blues came away from Anfield with a 2-0 win.
Despite their appearance at practice, both remain doubtful for Wednesday's second leg at Stamford Bridge.
Two other players who have been sidelined by injuries, midfielder Eden Hazard and forward Samuel Eto'o, also took part in Tuesday's workout at Chelsea's facility in Cobham.
The Blues' Frank Lampard and John Obi Mikel and Atletico captain Gabi will miss Wednesday's contest due to suspension for an accumulation of yellow cards. EFE