Carlos Alcaraz continued where he left off on the British grass by starting his Queen's title defence with a straight-sets victory over Argentina's Francisco Cerundolo.
The 21-year-old Spaniard won 6-1 7-5 in his first match on grass since lifting the Wimbledon title last year.
Alcaraz won the third major of his career on the French Open clay earlier this month, before switching back to the surface where he has played the least.
It looked a comfortable transition initially, but he ran into difficulty in his first-round match against 26th-ranked Cerundolo.
However, the world number two recovered to earn his 12th straight win on a grass court.