Three-time defending Qatar Open champion Iga Swiatek suffered a crushing 6-3, 6-1 defeat by Jelena Ostapenko in the semifinals on Friday, her fifth loss in as many meetings with the mercurial Latvian.

Former world number one John McEnroe has highlighted one area where Poland’s Iga Swiatek has struggled in the recent past. The 23-year-old is regarded as one of the best players currently playing in ...