Melbourne - Australian Lleyton Hewitt won through to the third round of the Australian Open after an injury retirement by his opponent Andy Roddick on Thursday.
Hewitt, who was leading 3-6, 6-3, 6-4 at the time of the retirement, will now play big-serving Canadian Milos Raonic in the third round on Saturday.
Roddick appeared to over-extend his upper right leg while trailing 3-0 in the second set, but continued until Hewitt went ahead by winning the third set.
"It's a nightmare for both of us," Hewitt said. "He stretched something higher in his leg and it was hard for me to concentrate at the other end.
"You know Andy is hurting and you try to block it out of your mind and it's hard to do.
"Without sounding too mean, you try to run him around a lot more because we're out there competing, but I just thank God that I got through that third set."
Hewitt, a runner-up in 2005, is playing in his 16th straight Australian Open and holds the all-time record for most consecutive appearances in his national Open, overtaking Jack Crawford and Harry Hopman.
The two-time grand slam champion's Australian Open match record now stands at 29-15.
He now shares seven wins each with Roddick. The American 15th seed went into the match on Rod Laver Arena as favourite after winning their previous six matches.
Hewitt, a one-time world number one, has slumped in the rankings to 181 after five significant operations over the last four years.
Collated results from the Australian Open in Melbourne on Thursday (x denotes seeding):
Men - Second round
Juan Ignacio Chela (ARG x27) bt Pablo Andujar (ESP) 6-4, 6-4, 6-3
Milos Raonic (CAN x23) bt Philipp Petzschner (GER) 6-4, 5-7, 6-2, 7-5
Michael Llodra (FRA) bt Alex Bogomolov Jr. (RUS x32) 6-1, 6-3, 4-6, 5-7, 6-4
Jo-Wilfried Tsonga (FRA x6) bt Ricardo Mello (BRA) 7-5, 6-4, 6-4
Novak Djokovic (SRB x1) bt Santiago Giraldo (COL) 6-3, 6-2, 6-1
Janko Tipsarevic (SRB x9) bt James Duckworth (AUS) 3-6, 6-2, 7-6 (7/5), 6-4
Frederico Gil (POR) bt Marcel Granollers (ESP x26) 6-3, 4-6, 6-4, 6-3
Nicolas Mahut (FRA) bt Tatsuma Ito (JPN) 1-6, 7-6 (8/6), 6-2, 6-2
David Ferrer (ESP x5) bt Ryan Sweeting (USA) 6-7 (4/7), 6-2, 3-6, 6-2, 6-3
Richard Gasquet (FRA x17) bt Andrey Golubev (KAZ) 6-4, 6-2, 3-0 - retired
Andy Murray (GBR x4) bt Edouard Roger-Vasselin (FRA) 6-1, 6-4, 6-4
Kei Nishikori (JPN x24) bt Matthew Ebden (AUS) 3-6, 1-6, 6-4, 6-1, 6-1
Mikhail Kukushkin (KAZ) bt Viktor Troicki (SRB x19) 5-7, 6-4, 6-2, 4-6, 6-3
Gael Monfils (FRA x14) bt Thomaz Bellucci (BRA) 2-6, 6-0, 6-4, 6-2
Lleyton Hewitt (AUS) bt Andy Roddick (USA x15) 3-6, 6-3, 6-4 - retired
Julien Benneteau (FRA) bt Gilles Simon (FRA x12) 7-5, 7-6 (10/8), 1-6, 3-6, 6-2
Women - Second round
Maria Sharapova (RUS x4) bt Jamie Hampton (USA) 6-0, 6-1
Ana Ivanovic (SRB x21) bt Michaella Krajicek (NED) 6-2, 6-3
Vera Zvonareva (RUS x7) bt Lucie Hradecka (CZE) 6-1, 7-6 (7/3)
Ekaterina Makarova (RUS) bt Kaia Kanepi (EST x25) 6-2, 7-5
Sara Errani (ITA) bt Nadia Petrova (RUS x29) 6-2, 6-2
Angelique Kerber (GER x30) bt Stephanie Dubois (CAN) 7-5, 6-1
Serena Williams (USA x12) bt Barbora Zahlavova Strycova (CZE) 6-0, 6-4
Zheng Jie (CHN) bt Roberta Vinci (ITA x23) 6-4, 6-2
Vania King (USA) bt Anastasia Pavlyuchenkova (RUS x15) 5-7, 6-3, 6-4
Sorana Cirstea (ROM) bt Urszula Radwanska (POL) 1-6, 6-2, 6-3
Petra Kvitova (CZE x2) bt Carla Suarez Navarro (ESP) 6-2, 2-6, 6-4
Sabine Lisicki (GER x14) bt Shahar Peer (ISR) 6-1, 6-2
Greta Arn (HUN) bt Dominika Cibulkova (SVK x17) 6-2, 3-6, 10-8
Maria Kirilenko (RUS x27) bt Aleksandra Wozniak (CAN) 6-4, 1-6, 6-2
Marion Bartoli (FRA x9) bt Jelena Dokic (AUS) 6-3, 6-2
Svetlana Kuznetsova (RUS x18) bt Sloane Stephens (USA) 7-6 (8/6), 7-5