By Shrivathsa Sridhar LONDON (Reuters) -Aryna Sabalenka maintained her stranglehold over Belgian Elise Mertens with a hard-fought 6-4 7-6(4) victory on Sunday to reach the Wimbledon quarter-finals as she bids for a maiden title at the grasscourt Grand Slam.

Aryna Sabalenka, who has won three Grand Slam titles, is just a few steps away from clinching her fourth and first-ever Wimbledon title

After suffering a heartbreaking defeat in the French Open final last month, Sabalenka has used that disappointment as fuel as she looks to win her first Wimbledon title. In the round of 16 match, she