Wayne Rooney was absent from the open 15-minute section of training on Tuesday morning ahead of Manchester United's Champions League semi-final against Schalke at Old Trafford.
Rooney had not suggested there was any problem when he tweeted that he was heading for training after dropping son Kai off at his nursery, but he was missing as United went through their paces at their Carrington training complex.
In itself, Rooney's failure to appear should not be viewed as an indication he will not be involved against Schalke. The 25-year-old England striker also missed a similar session ahead of United's meeting with Chelsea in the quarter-finals and still scored in the Red Devils' first-leg victory.
In addition Sir Alex Ferguson has also suggested Rooney will not start on Wednesday as the Scot intends to select top scorer Dimitar Berbatov and Michael Owen for a game in which his side will be defending a 2-0 first-leg lead.
With a crucial Premier League encounter with Chelsea to come on Sunday, Ferguson will be giving plenty of thought to the players he intends to choose.
Darren Fletcher, who has been out for two months with a virus, was training and is available, but Brazilian defender Fabio, who suffered a knock in Sunday's defeat at Arsenal, did not train and seems unlikely to be involved.
Denmark keeper Anders Lindegaard has recovered from the knee ligaments injury that has ruled him out for a couple of months should Ferguson wish to rest first-choice keeper Edwin van der Sar.
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