Nick Kyrgios has lost to a former sparring partner.
Nick Kyrgios has lost to a former sparring partner.

Kyrgios collapses as Wawrinka roars back

NICK Kyrgios has lost to former world No.3 and one-time sparring partner Stan Wawrinka in the opening round of the Canadian Open in Toronto.

Kyrgios, who last week withdrew from the Citi Open in Washington DC due to an ongoing injury, raced to take the opener but was on the wrong end of the two tough sets that followed, losing 1-6 7-5 7-5.

The world No.17 showed glimpses of his best, however, unleashing a brutal forehand winner that even three-time grand slam champion Wawrinka applauded.

"What can you say?" Sky Sports commentator Mark Petchey said.

It was one of 44 winners Kyrgios struck to Wawrinka's 35. The Swiss had 23 unforced errors to Kyrgios' 34.

The Aussie star said his hip injury was still an issue but we would play doubles with Ivan Dodig.

"It's great to see him back," Kyrgios said of Wawrinka.

"Matches like can give him positives ... I can't take any positives from that for me."

Kyrgios was at the centre of controversy in Canada three years ago when he alleged that fellow Australian Thanasi Kokkinakis had slept with Wawrinka's girlfriend, Donna Vekic.

Wawrinka said in the lead-up to the match that the relationship between him and Kyrgios was "not an issue".

"It's true that we had a clinker, but time has gone since when we lift the spirits. Facing him on Tuesday is not an issue at all," he told Tennis World.