Del Potro may face an Isner marathon in Miami
Fatigue the biggest danger to the Indian Wells champion
Sky Sports Arena, 6pm Friday
Juan Martin del Potro will be pleased to have had a day off after edging through his toughest match of the last three weeks in a 5-7 7-6 7-6 Miami Open quarter-final victory over in-form Milos Raonic.
Del Potro, who is bidding to make it three titles on the trot in Key Biscayne after tournament triumphs in Acapulco and Indian Wells, did well to pip Raonic but understandable tiredness probably made his task that much harder.
A day off will help the Argentinian's cause against semi-final rival John Isner, who was a 100-1 shot before the Crandon Park tournament started. But after 15 successive match victories, fatigue could again kick in for Delpo in what may prove a difficult match against Isner, who is also playing blinding tennis in Florida.
A fresh Del Potro may have been able to put some daylight between himself and the big-serving American, but with Isner in peak form and the favourite's gas probably running a little low, a close battle is anticipated.
The early support was for Isner, who demolished last-eight opponent Hyeon Chung 6-1 6-4 thanks to a 97 per cent first-serve points-won percentage.
If Del Potro, who needs two more wins to land the Masters 1,000 Series spring double, has gone over the top Isner could be big value to reach the final. But in the expectation that the Tower of Tandil can still play a part in proceedings, an interest on a three-set match could be prudent.
1pt 5-4 Betway
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