Portugal Colonial - Thompson brought down to earth with Mexico Open exit

Thompson, who went on a giant-killing run before defeating Casper Ruud to win the Los Cabos Open final on Sunday, was ousted in three sets by American qualifier Aleksandar Kovacevic, losing 6-3, 5-7, 6-4 in 2hr 42min.

Kovacevic will play Holger Rune in the second round after the Danish second seed cruised past Michael Mmoh 6-2, 6-3 earlier Tuesday.

In other games on Tuesday, Greece's Stefanos Tsitsipas, the fifth seed, eased past Russian Roman Safiullin 6-3, 6-4.

Tsitsipas will play Italian qualifier Flavio Cobolli in the second round.

"It's one of those first rounds that you get good opponents and a very good, strong start from the beginning of the tournament," Tsitsipas said in an on-court interview after his win.

"I knew that dealing with Roman, he's someone that can play good on these kinds of surfaces. He takes the ball early, pushes you back.

"That was the main thing I had to deal with today, which I did pretty well."

Meanwhile, Sunday's beaten Los Cabos finalist Ruud, the sixth seed in Acapulco, needed three sets to overpower Christopher Eubanks, eventually winning 6-4, 6-7 (5/7), 6-3.

American eighth seed Frances Tiafoe defeated Australia's Max Purcell 4-6, 6-3, 6-0, and now faces Germany's Dominik Koepfer, a 6-4, 4-6, 6-0 winner over France's Terence Atmane.

P.L.Madureira--PC