Andy Murray put a marker down in the men’s singles after easing into the second round but the defending Olympic champion suffered an early exit in the doubles alongside brother Jamie.

Murray, who won his second Wimbledon title before the 2016 Rio Games, started his defence against the experienced Serbian Viktor Troicki on Saturday.

The Scottish star dropped his first service game but he looked imperious after that initial blip, going on to record a comfortable 6-3 6-2 victory.

He advances into the second round of the competition and is now the firm favourite to retain his singles title following the shock exit of world number one Novak Djokovic.

Serbia’s talisman lost 7-6 (7-4) 7-6 (7-2) to Argentina’s Juan Martin del Potro and the multiple Grand Slam winner was in tears when he left the court.

Murray will now play Argentine Juan Monaco in the next stage of the competition and the defending champion is 1.04 to pick up the win while his opponent is an 8.50 outside shot.

The Brit admits there is big expectation on his shoulders in Rio and the glory days of winning gold at London 2012 are firmly in the past right now. “It’s more trying to win another medal,” he said.

“That builds the pressure, and wanting to do something here.

It’s sort of the pressure I am putting on myself. I’m not thinking about four years ago.”

Murray will not be claiming doubles gold in Brazil after he and brother Jamie were knocked out at the first hurdle by Brazilian pair Thomaz Bellucci and Andre Sa, losing 7-6 (8-6) 7-6 (16-14).

Elsewhere, there was good news for Britain’s number one Johanna Konta as she defeated Stephanie Vogt 6-3 6-1 in the women’s singles.