Bertens reaches Elite Trophy last four as Keys and Riske bow out

The first place in the final four of the WTA Elite Trophy in Zhuhai was secured by Netherlands' Kiki Bertens while Madison Keys and Alison Riske were defeated.

World number 10 Kiki Bertens   -  Getty Images

Kiki Bertens secured a place in the semifinals of the WTA Elite Trophy with a straight-sets win over Dayana Yastremska.

The top seed defeated the Ukrainian teenager in their only previous meeting at the China Open last month and repeated the feat in routine fashion in Zhuhai.

Bertens prevailed 6-4, 6-3, ensuring she progresses from the Azalea Group ahead of Yastremska, with both players having beaten Donna Vekic in their other match.

Karolina Muchova condemned Alison Riske to an exit from the tournament as she came from behind to beat the American in the Czech's debut in southern China.

Muchova was the last player to qualify for the Elite Trophy and twice needed to stage a fightback to start her campaign with a triumph.

She recovered from losing the first set to force a decider and, after going down 3-1 in the third, again showed her powers of resilience to prevail 2-6, 6-2, 7-5.

Muchova's match with second seed Sofia Kenin will decide who progresses from the Camellia Group.

Meanwhile, Madison Keys fell out of contention despite beating Petra Martic 6-3, 6-4.

Martic's meeting with Zheng Saisai will decide who goes through from the Orchid Group. Zheng needs to win only seven games regardless of the result to progress. Martic must win and can concede no more than six games.

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