Sylvester Emmanuel, the only Nigerian player who was contesting for a spot in the quarterfinals, retired due to a wrist injury against Zimbabwe’s Benjamin Lock while trailing 0-6, 0-3 in their second round encounter on Thursday.

Lock, who’s ranked 548th in the world, had sped to a first set win and was up 3-0 in the second set, before Emmanuel called it quits as a result of the injury.

For a place in the semifinals, the Zimbabwean will take on third seed, Arjun Kadhe of India, who dismissed Burundian, Guy Orly Iradukunda, 6-2, 6-2 in 59 minutes.

On Centre Court, second seed, Sadio Doumbia recovered from an opening set loss to beat his countryman, Maxime Mora, 5-7, 6-3, 6-2.

Doumbia, who had dropped only a game in his first round match win, squandered a 5-2 lead in the first set, as Mora fought back to win five games on the bounce and take the set. Doumbia would again open a 5-2 lead in the second set, but this time left no room for errors, as he held firm to take the set and level the match. The 28-year-old, who’s now the highest-ranked player left in the draw, would put his foot down to take the final set emphatically and close out the match in 2 hours and 22 minutes.

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Sadio Doumbia (L) and Maxime Mora walk off court after the former’s victory at the National Tennis Centre on Thursday.

Up next for Doumbia is 18-year-old Swedish qualifier, Simon Yitbarek. Yitbarek produced a superb performance to beat his coeval, Gilbert Soares Junior of Brazil 6-4, 6-1 and advance to the quarterfinals.

Against the Brazilian, Yitbarek found the crucial break early in the first set for a 2-1 lead, and stayed composed the entire set to take it. The Swede’s brilliance shone brighter in the second set as he powered through to take the match in 76 minutes.

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‘Wakanda Forever.’ Simon Yitbarek celebrates after his match win.

Elsewhere, Floyd Angele defeated 2018 semifinalist, Danylo Kalenichenko, 6-1, 3-6, 6-1, and will face Peter Kobelt, who beat Michail Pervolarakis 6-4, 6-3, while Dan Added eased past Arvid Nordquist of Sweden 6-0, 7-5 and will play William Bashamuka of USA, who defeated Taipei’s Li-Wie Tan 6-3, 6-2.