World number one Neil Robertson claimed the final two frames to beat Mark Allen 6-5 in the opening round of the Masters at Alexandra Palace in London.

Allen won the opening frame with a 114 break but Robertson took the fourth on the black to level at 2-2.

Robertson never led but stayed within a frame and a 59 in the decider sealed a quarter-final with Stephen Maguire.

Ricky Walden won the last four frames to beat Barry Hawkins 6-5 and faces Ronnie O'Sullivan in the last eight.

Hawkins was 5-2 up but a mistake on a re-spotted black allowed Walden to level the match before taking the win.