MIAMI, March 28: World number one Roger Federer survived a second-round scare to squeeze past Nikolay Davydenko of Russia 6-2 3-6 7-5 at the Nasdaq-100 Open on Saturday.
Having overcome a poor start to level the match, Davydenko threatened to bring the Wimbledon champion's winning run to a shuddering halt in a tight third set. It took Federer until 5-5 in the decider before he could break the Davydenko serve and drag himself to safety.
The Swiss has now won 12 matches in a row, including back-to-back titles in Dubai and Indian Wells. Federer also took the honours at the Australian Open and has been beaten only once in 20 matches this year. His sole defeat was at the hands of Tim Henman in Rotterdam last month.
World number two Andy Roddick burst through to the third round with a 6-2 6-4 win over Slovak Karol Beck. Despite a lightning start, Andre Agassi had to battle his way past Argentina's Mariano Zabaleta 6-0 7-6 (7-1).
Australian Open runner-up Marat Safin tumbled out, losing 7-6 6-7 6-4 to in-form American Vince Spadea.
VENUS WINS: In the women's draw, second seed Venus Williams put out China's Jie Zheng 6-4 6-4 to join her sister Serena in the third round.