Andy Murray will not be joining Heather Watson in "happy land" unless he achieves at lot more at Roland Garros this year than Tuesday's first-round win.

The fourth seed lost only eight games against French qualifier Eric Prodon but he cut a frustrated figure on Court Suzanne Lenglen and felt he had much to improve on.

Murray's demeanour was in stark contrast to 19-year-old Watson, who was grinning from ear to ear after securing her first win in the main draw of a grand slam on Monday.

The Scot has a reputation for showing negative emotion but he insisted the difference between the two is only to be expected given the contrast in experience and expectation.

He said: "I remember when I won my first match at Wimbledon, I won against (George) Bastl on Court 2, and it's a great feeling when you get there for the first time.

"Getting through these first matches is all good experience, and I'm sure Heather will win many more here.

"But it's very different for me. I'm sure in five or six years, when Heather is playing at Wimbledon or a slam and she has a lot of pressure on her, it will be different.

"When you play your first few grand slams, it's a great experience. You're happy to be there. I'm still very happy to be here, but I'm here to win the tournament."

Murray will take on a qualifier for the second consecutive round today but Italy's Simone Bolelli is a much tougher prospect than Prodon.

Bolelli was ranked in the top 40 two years ago and gave the 24-year-old a tough match in their only previous meeting on clay, in Madrid in 2009.

Murray said: "He hasn't been playing that well the last year and a half or so but he's a very talented guy, flashy."