Defending champion Marin Cilic booked his place in the second round of the Fever Tree Championships at the Queen's Club in London with victory over Chile's Christian Garin.
Croatian Cilic -- who defeated world No. 1 Novak Djokovic in last year's final -- cruised through the first set before showing his mettle in a tighter second to come through 6-1, 7-6 (5) in one hour and 17 minutes.
Also a champion in 2012 and a finalist in 2013 and 2017, Cilic will next play Argentina's Diego Schwartzman who swept aside qualifier Alexander Bublik 6-2, 6-3.
Fourth seed Daniil Medvedev is also through to the second round after he saved five break points and ended a five-match losing streak to beat Spain's Fernando Verdasco 6-2, 6-4.