Murray's unconvincing preparations for SW19 continued when he was beaten 6-7 (5/7) 6-4 10-7 by Janko Tipsarevic at The Boodles tournament.
It was only his second match on grass following his early exit from the AEGON Championships last week and he will return to the grand setting of Stoke Park on Thursday when he will play world number one Novak Djokovic.
Wimbledon begins on Monday and the 25-year-old insists he will feel the pressure as acutely as ever, even if the likes of Euro 2012, London 2012 and The Open are competing for the public's attention.
"Every year it makes no difference to me whether a big football competition or the Olympics is on," Murray said.
"It's the same because I always put pressure on myself to do well.
"Every time you play at the big events you want to prove you're at the top and I'll try to do that at Wimbledon.
"I reached the semi-finals last year and you want to do better every year you play at Wimbledon.
"It's going to be tough, there are a lot of tough players around, big servers with big games that are very tough early on, especially on grass."
Murray hopes Britain will be celebrating a summer of sporting excellence.
"The whole summer will be exciting because there are so many big events on like Euro 2012 and the Olympics," he said.
"Hopefully a lot of the teams and individuals can perform well over the next few months because it will be great for British sport."
Murray, who was installed as Wimbledon fourth seed earlier today [Thursday], was subjected to a challenging afternoon by Tipsarevic.
The Scots welcomed the work-out against the Serbian world number eight.
"It's always good to get matches in before a big event, especially against a top 10 player so it was a good test," he said.
"I was moving much better than I was a week ago at Queen's, I wasn't slipping around as much which will be important for Wimbledon.
"I'm hitting the ball very well and practice has been very good over the last few days.
"I've got another match here tomorrow [Friday] and then I'll spend two or three days at Wimbledon before the tournament starts."
Watch: Djokovic beats Murray in Wimbledon warm-up... More Videos
Reigning and deposed champions, Djokovic and Rafael Nadal respectively, have been installed as first and second seeds, but Murray is unable to choose between the two.
"I don't think there's a clear favourite. They've both done unbelievably well and have been so consistent at the Slams," he said.
"Rafa's won the last few matches against Novak, but Rafa's always found it very against about him, especially over the last couple of years. I can't pick one."