Hamilton was forced out of the Canadian Grand Prix with brake failure while Rosberg, who was suffering power problems, managed to come home second. That extended the German's points advantage to 22, and Hamilton admits it won't be an easy gap to cut.
"Montreal was a bit of a strange one for me," reflected the Brit. "I felt I had the pace right from the beginning of the weekend, but things just never quite came together.
"It's frustrating when these things are out of your hands. The two DNFs so far this season have not been ideal but that's racing and there's a long, long way to go."
Hamilton went on to suggest that he'll need to win the next four races to get back on terms with Rosberg, who is yet a finish outside the top two positions in 2014. Assuming he continues that streak, a run of four Hamilton wins would bring to Brit to within a point of his team-mate ahead of F1's summer break.
"I caught up before and I can catch up again," said Hamilton. "It's going to take another four wins to make the difference so I'm going to do my best to get those results. Right now, I'm just looking ahead to the next race in Austria and another chance to catch up to the lead," he said ahead of this weekend's race at the Red Bull Ring venue.
"I've never driven the circuit but I've been working on it in the simulator and I'm sure I'll learn it pretty quickly when we get out on track.
"It's always exciting to go to a new venue, so it should be an interesting weekend. I'm feeling good in the car right now and I'll be pushing flat out to come away with maximum points this time around."
Like the majority of the current Formula One grid, Hamilton did not race at Red Bull Ring during its previous incarnation as the A1 Ring.