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Rising Canadian tennis star Victoria Mboko is through to the quarterfinals of the Qatar Open after upsetting fifth seed Mirra Andreeva 6-3, 3-6, 7-6 (5) on Wednesday.

Mboko, seeded 10th at the WTA 1000 hardcourt tournament, survived match point when Andreeva committed a double fault before converting a crucial break to tie the third set 5-5.

The Canadian finished off the victory in the tiebreaker by ending a match-point rally with a backhand winner.

“I feel like I came out...