Dan Evans
Dan Evans shocks Bernard Tomic to reach the third round of the US Open. [Reuters]

British number three Dan Evans continued his remarkable run at the US Open with a scintillating four-set victory over Australian number one Bernard Tomic in the second round.

Evans, who entered the tournament ranked 179, had already caused a major upset when he beat 11th seed Kei Nishikori in his opening match and was once again the underdog going into his match with Tomic.

Yet the 23 year old displayed a superb range of shots that the world number 52 had no answer to as Evans secured a memorable 1-6 6-3 7-6 (7-4) 6-3 victory to reach the third round where he will face 19th seed Tommy Robredo.

It had looked as though Evans' dream run would come to an end when he lost the opening set in just 22 minutes and then lost his serve at the start of the second but he continued to go for his shots and hit an array of impressive winners.

"It was pleasing I could find some belief inside and come back and find my game, because it wasn't there," said Evans after the match.

"I looked at the clock, I think it was 34 minutes, I was a set and a break down. It was looking like the airport for me. So, yeah, it was good."

Evans has always had the talent but his application has led to him struggling to make a living from the game. However, in recent months he has rededicated himself to the sport and it showed during a memorable match at Flushing Meadows.

Having lost his serve in the second set, the Brit responded superbly to break on two occasions as he levelled the match.

Breaks were swapped at the start of the third as it eventually came down a tie break. The 6ft 5" Tomic was struggling with Evans' free flowing tennis and the Brit was able to produce a burst of winners to take the lead for the first time.

Evans dropped his serve at the start of the fourth set but it was the 20 year old Australian who faltered as he fell 4-1 behind. Tomic was shell shocked and was unable to respond as Evans hammered down two aces in the final game to seal victory in two hours and 20 minutes.

"I played well today, but I missed quite a lot. I didn't serve great I don't think. I served pretty decent at times when I needed to," added Evans.

"In the last match, I was really clinical. I could have been a bit more clinical today. That may be a bit harsh - I just won against Tomic."