Serena Williams rolls back the years at US Open to beat No 2 seed Kontaveit

• 23-time major champion seals 7-6, 2-6, 6-2 victory
• As it happened: Beau Dure's game-by-game report

Serena Williams is improbably through to the third round of the US Open after a 7-6 (4), 2-6, 6-2 win over the second-seeded Anett Kontaveit on Wednesday night, extending what she's strongly hinted will be the final event of her storied career for at least two more days.

The 23-time major singles champion, who entered the tournament ranked 605th with only one match win in 450 days, won a tense opening set in a tiebreaker before Kontaveit, the world No 2 from Estonia, broke immediately to open the second then twice more to force a decider.