He admits that it could be a tough game against Gulbis, particularly if the Latvian serves well.
"He's a very tough player, he's very talented," said Murray. "He has caused a lot of the top players problems in the past.
"He goes for it so he dictates a lot of the match, he can serve at 140mph and if he serves well then he can be very tricky.
"I'll need to play a little better than I did [against Granollers] if I want to come through that."
Murray takes on Gulbis at around 8pm this evening.