Spain’s Carlo Alcaraz beats Croatia’s Marin Cilic to progress to the last 16 of the Qatar Open.

Top-seeded Carlos Alcaraz has overcome Croatian veteran Marin Cilic 6-4, 6-4 to reach the round of 16 at the Qatar Open.

The 36-year-old Cilic, the 2014 United States Open champion who has fallen to number 192 in the rankings, was playing his first match of the season after recovering from a long-term knee injury.

The Croatian led 4-3 and 0-40 on Alcaraz’s serve in the second set on Friday, but the Spanish four-time major winner managed to recover and then broke in the next game.

“I am just really happy that I stayed calm at that moment – breathing, going through my routines, making good points,” Alcaraz said. “That’s why I was able to win in two sets.”

Alcaraz will play either China’s Zhang Zhizhen or Italy’s Luca Nardi next.

Earlier, seventh-seeded Grigor Dimitrov lost 6-4, 6-4 to Jiri Lehecka.

Also on Monday, eighth-seeded Briton Jack Draper beat Australia’s Alexei Popyrin 6-2, 7-6 (4) to set up a meeting with another Australian, Christopher O’Connell.

Several other top players will play their first matches on Tuesday.

Second-seeded Alex de Minaur will face Roman Safiullin. Novak Djokovic, who had to pull out of his Australian Open semifinal with a hamstring injury, will take on Matteo Berrettini.

Daniil Medvedev, Andrey Rublev and Stefano Tsitsipas will also play on Tuesday.