Henman battles back in Miami

Tim Henman had to fight hard in the second set of his match with Felix Mantilla to earn a place in the last 16 of the Nasdaq-100 Open in Miami.

The British No 1, second in the Champions Race, came through a 7-5, 6-4 winner, but had to come from 4-2 down in the second set.

Henman demonstrated the form which has taken him so high in the early-season rankings to force the second set back onto serve and another break gave him the chance to receive for the match.

Mantilla lost to 15 when he served a double fault, handing Henman a meeting with Switzerland's Roger Federer.

Pete Sampras was humbled 7-6, 6-1 by Chilean qualifier Fernando Gonzalez, extending the American's title drought to 24 tournaments. Sampras surged to a 4-1 lead, but the Chilean broke back.

In the second set Gonzalez roared to a 5-0 lead before closing the match with a thundering ace.