Cape Town - Stan Wawrinka continued his run of good form as he secured a straightforward win over Ryan Harrison in the opening round of the Mexican Open on Tuesday.
After a difficult 2018 campaign, Wawrinka is starting to find form again as he finished runner-up at the Rotterdam Open a fortnight ago.
And he again looked in excellent nick against Harrison as he secured a 6-4, 7-6(8-6) victory over the American.
A break in the first game of the match set him up and, although he also squandered a break in the opening game of the second set, he held Harrison off in the tie-breaker.
He will face another American in the second round after seventh seed Steve Johnson saw off Mexican wildcard Gerardo Lopez Villasenor 7-5, 7-5.
The sixth-seeded Frances Tiafoe overcame a first-set setback to beat Jordan Thompson 3-6, 6-4, 6-3.
Eighth seed John Millman also made a confident start to his campaign as he beat Marcel Granollers of Spain 6-3, 6-4 and up next is German Peter Gojowczyk, who was a 5-7, 6-4, 6-2 winner Mexican qualifier Federico Gaio.