Anett Kontaveit clinched the WTA St Petersburg Ladies Trophy title, fighting back to win an enthralling three-set final against world number seven Maria Sakkari on Sunday.

The Estonian, ranked ninth in the world, won her sixth career singles title after recording a tense 5-7 7-6 (7-4) 7-5 win over her Greek rival, in a clash between the tournament's top two seeds.

The victory means Kontaveit leads Sakkari for head-to-head victories, winning seven of their 13 meetings to date, and stretched the champion's remarkable run of indoor wins to 20 matches.

She was made to suffer before recording her first title of 2022, winning the eagerly awaited clash after a gruelling three hours of tennis.

Sakkari struck the first blow, winning a tense opening set as she targeted a first WTA 500 title of her career.

Kontaveit responded strongly and forced a decider by winning a tight second via a tie-break.

Greek top seed Sakkari found herself one service game from victory after a strong start to the third set, before Kontaveit's counter-attack arrived.

Kontaveit rallied after going 5-3 down by registering consecutive breaks, before comfortably seeing out her final service game, and has now won five of her last six singles finals.