Great Britain’s Andy Murray says he and Joe Salisbury have the potential to be a good partnership after they reached the quarter-finals at Tokyo 2020.

The British duo defeated Germany in straight sets to reach the last eight.

It means Murray’s quest for a fourth Olympic medal goes on despite concerns surrounding his fitness.

The two-time Wimbledon winner was forced to pull out of the singles due to an ongoing thigh problem.

The 34-year-old decided instead to solely focus on his doubles partnership with Salisbury and it could prove to be an inspired decision.

It was a relatively straightforward win against Germany pair Kevin Krawietz and Tim Puetz as they defeated them 6-2 7-6 (7-2).

Murray and Salisbury – a two-time Grand Slam doubles champion – have come through both their matches thus far in straight sets and will face either the America duo of Rajeev Ram and Frances Tiafoe or Marin Cilic and Ivan Dodig of Croatia next.

Speaking afterwards, Murray said he was very satisfied with both he and Salisbury’s performance as he seeks to become the first man to win four Olympic medals since tennis returned to the schedule in 1988.

“I think we have the potential to be a really good team, I think the result today showed that,” he said.

“I think we were well-deserved winners today, we created lots of chances, but not every doubles match is like that.

“If we keep the same sort of attitude and everything, prepare diligently, I think we’ve got a chance of doing well. But it’s not easy, just because we won that match.”

Elsewhere, home favourite Naomi Osaka is out after being stunned by Czech player Marketa Vondrousova in straight sets.

The four-time Grand Slam winner was one of the faces of the games and lit the Olympic cauldron in last week’s opening ceremony.

However, she failed to perform and lost 6-1 6-4 to the world number 42 in round three.

“I definitely feel like there was a lot of pressure for this,” said the world number two.

“I think it’s maybe because I haven’t played in the Olympics before and for the first year it was a bit much.”

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