There is no guarantee Arsenal captain Cesc Fabregas will be risked, and United manager Simon Grayson is unlikely to know the strength of Arsene Wenger's line-up until the teams are announced.
But Fabregas is the heartbeat of a supremely gifted squad and a midfielder of almost unrivalled talent in the Premier League.
At 23 he has already won both the World Cup and the European Championship, and Barcelona fought hard to sign the Spanish international last summer.
If he plays, Leeds' fate in London will depend on stifling him but Fabregas in full flow is always a sight to admire.
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