NEW YORK, AFP: Serena Williams roared into the third round of the US Open on Wednesday, overpowering second seed Anett Kontaveit with a battling performance to extend her Grand Slam singles career dramatically.

The 40-year-old tennis icon, who has signalled she plans to retire after the tournament -- drew on all her reserves of resilience and sheer fighting spirit to take down Kontaveit with a 7-6 (7/4), 2-6, 6-2 at an electric Arthur Ashe Stadium.

Kontaveit appeared to have gained the upper hand over the 23-time Grand Slam singles champion after levelling the match at 1-1 with a dominant second-set display.

But Williams showed her champion’s mentality to yank back momentum in the decider, breaking Kontaveit twice before closing out victory to leave a sell-out crowd featuring the likes of golf superstar Tiger Woods on its feet.

“You know this is what I do best,” a delighted Williams said after her win.

“I love a challenge and love rising to the challenge. I haven’t played many matches but I’ve been practicing really well and my last few matches it just wasn’t coming together...But the last couple of matches here in New York it’s really come together.” 

Williams, who won the first of her Grand Slam singles titles as a 17-year-old at the US Open in 1999, said she was now playing with no pressure with the finish line of her remarkable career.

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