Andy Murray has called on British tennis to raise its ambitions after Kyle Edmund and Heather Watson joined him in the second round at the French Open.
Murray and Watson both scored straight-sets wins while qualifier Edmund emerged victorious after a gruelling fives sets against France's Stephane Robert.
Not since 2011 have three Britons managed to get past the opening round at Roland Garros, but Murray insisted such successes should be kept in perspective.
"It depends on what is 'doing well'," Murray said. "Winning a couple of rounds at a French Open for us, for the UK, is good but I don't think France or Spain or the Argentinians - I don't think they look at it and would be very impressed by that.
"A lot of the other nations have multiple players going deep into the grand slams and ultimately that's where you want to try to get to.
"Tennis in the UK is obviously a big sport, there's a lot of money invested in it, so you want to try to get as much depth as possible.
"For us it's great, but I don't think the other countries are looking at it and saying, 'I think it's great you have two or three players in the second round of a grand slam'."
Britain started the day with five players in the first round, but Aljaz Bedene was beaten in four sets by Austrian youngster Dominic Thiem, while Johanna Konta lost in three to Czech Denisa Allerto.
"I saw a little bit of Bedene and Thiem's match before I went on," Murray said. "It seemed like it was a pretty good match. Thiem is obviously a tough opponent on clay.
"It's obviously good that Heather has won. It's obviously nice - the more British players in the tournament the better.
"The last few years there has been lots of doubles guys around, which is nice, but more players in the singles, it's obviously good."
Murray saw off the challenge of Argentina's Facundo Arguello with a regulation 6-3 6-3 6-1 victory as he bids to claim his first French Open title.
The Scot admitted to feeling nervous before play got underway, but will now face either Canada's Vasek Pospisil or Portugal's Joao Sousa in round two.
"It was definitely tricky," Murray said. "I felt like when I got some good depth into his backhand, I was able to dictate a lot of the points.
"When he hit the first ball with his forehand, he was able to make me run and do a lot of moving. He's a tough, tough player."