Nick Kyrgios out of Halle Open with knee injury shortly after comeback

Last year’s Wimbledon runner-up Nick Kyrgios withdrew from the Halle Open on Monday in his latest setback as he tries to recover from a long-running knee injury.
“I tried everything here in Halle the last couple of days, but then I had to make the decision to pull out”, Kyrgios said in a statement on the tournament website. “I want, when I play, to deliver a performance like last year when I was in the semifinals. But that will really not be possible.” Tournament organizers said Kyrgios was “still suffering from the aftereffects of a complicated knee injury which had put him out of action for around seven months,” adding that he felt a recurrence of the knee issue while training in Halle.
Kyrgios, who had knee surgery in January, returned to action last week for the first time since October in a straight-set loss to Wu Yibing at the grass-court Stuttgart Open.
Halle is another grass event viewed as a warmup for Wimbledon. The Australian had been due to play Lorenzo Sonego in the first round and his place has now been taken former Australian Open semifinal Aslan Karatsev.