Sir Bobby said: "We have to get a consistent run of games going where we are winning games.
"We've got a great record at home and we need that to continue if we are going to get that fourth spot. But there are a whole host of teams in the same boat, like Birmingham, Liverpool, Charlton and Aston Villa.
"The team who puts together the best run of results now will get to fourth place, I really do think it's that simple.
"Everyone is battling for the same prize, but we have to get a run going quickly.
"Kieron Dyer has recovered and trained well, as has Aaron Hughes. But we'll check on them before the game before making a decision.
"Gary Speed has also recovered well after missing the game for Wales with a bug. He was a lot better on Friday, and we'll check him on Friday along with Andy O'Brien who has a slight hamstring.
"The only real long-term injury is Andy Griffin, and he should be back in around two weeks.
"But with such an important run of games coming up, starting with Everton then PSV, then Arsenal, then PSV again followed by Aston Villa, we certainly won't be risking anyone if they aren't 100 per cent."
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