Gulbis said: "I did a lot of physical work and physically I’m much better than I was and tennis-wise, slowly, slowly, I’m getting my form back. I just need one tournament to play good. I think I’m going to be confident then. I lack a little bit of confidence now because I didn’t win a lot of matches. But if I make one good tournament, I think I can do much better.
"The tennis can’t just disappear. I am playing aggressively like I did before, because for the last couple of matches I didn’t play the game which I am used to playing. I played a more defensive game, but that’s not my game. I understand that now."
Gulbis is also confident he can cope with the Centre Court atmosphere, which was warmly supportive of Murray in his first-round triumph against Robert Kendrick without reaching the rapture which inevitably accompanied matches involving Tim Henman.
Gulbis, who reached the quarter-finals of the French Open last year and the fourth round in New York the year before, said: "The Wimbledon crowd are pretty fair. They will cheer more for him but they will not disturb my game.
"For me it doesn’t matter if somebody is for my opponent.
"I played once in Macedonia and they were like showing fingers and laughing so I think here it’s easy."
Murray was taking nothing for granted.
"Gulbis is a very tough opponent," he said. "He has caused some upsets in the past and is a huge hitter of the ball. I’m going to need to be on my game to beat him."
Meanwhile Alex Bogdanovic revealed he may call time on his singles career on the day the Lawn Tennis Association decided "enough is enough" for British tennis’ most famous flop.
The 25-year-old made it eight first-round singles losses from eight Wimbledon appearances on Tuesday when he was beaten in straight sets by 20th seed Tomas Berdych.
Bogdanovic has needed a wild card to get into the main draw on every occasion, and according to LTA head coach Paul Annacone he will no longer be recommended to the All England Club for such an entry.
"If you got any of the tennis experts around the world to go and watch Alex hit a ball for an hour, they would agree there are very few people better than him," said Annacone.
"So that begs the question, ’What’s the problem?’.
"I wish there was a magic pill that he could take or we could give him to address that problem.
"But Boggo knows the clock is ticking fast and, for Wimbledon, it maybe has stopped for him and he’s in only on his own merits now.
"There comes a time when you think enough is enough and I think Boggo probably realises this is his last opportunity."
There was better news for Bogdanovic yesterday when he and James Ward reached the second round of the men’s doubles with a 6-4 6-4 6-4 win over David Martin and Jean-Claude Scherrer.