Manchester United defender Wes Brown looks set to miss Wednesday's UEFA Champions League clash with Celtic.
Brown, who has sat out United's last two games with an ankle problem, was absent from training on Tuesday.
Gary Neville and young Brazilian Rafael Da Silva will battle it out to start at right-back at Parkhead.
United boss Sir Alex Ferguson is already missing injured midfield duo Paul Scholes and Owen Hargreaves for the Battle of Britain contest.
Reserve-team skipper James Chester has been drafted into United's squad for the trip to Glasgow.