The world number 14 from Hong Kong never looked in doubt of progressing as he returned to the table 5-3 ahead after the first session against a valiant Anthony McGill.
Fu shows his class and experience
Scotland's McGill was the fastest man to find his range though, as breaks of 57 and 67 helped him to win the first three frames of the second session and edge into the lead for the first time. Yet Marco Fu is an experienced campaigner and was able to grind out four of the next five frames, including the highest break of the match at 102 in the thirteenth frame, as he went 9-7 in front at the end of the second session.
McGill was again the fastest man out of the blocks in the final session as a break of 97 gave him hope, but it then all came together for Fu as he once again claimed four of five frames, with three half centuries and a century, to win 13-9.
Fu analysed his performance suggesting ''there were a lot of mistakes in the first two sessions but I played better in the third''. He also claimed he will "not watch Ronnie O'Sullivan against Barrry Hawkins, just want to practice on my own game", as he awaits his quarter-final opponent.
Williams edges a lacklustre contest
Mark Williams found himself in all sorts of trouble to Michael Holt as he fell 4-1 behind to the qualifier who secured three early breaks over 60. Yet Williams dug deep to win five consecutive frames, including a match high break of 87 in the ninth, as he went 6-4 ahead.
In a match bereft of quality, Holt produced his highest break of 83 in frame eleven, as he produced a mini resurgence to win two frames and draw level, but Williams accelerated towards the end of the second session to win four more consecutive frames and lead 10-6 overnight. The pair will conclude their match on Saturday afternoon.
Ali Carter holds a slender advantage
Ali Carter and Alan McManus still have everything to play for in their conclusion on Saturday morning, as neither player was able to take control following a tight opening session that saw Carter leading 5-3.
The crowd were treated to a tactical feast, as both players shared all eight frames one at time as they remained in a similar position to where they started with Carter two frames ahead. McManus produced breaks of 71 and 77 as both players struggled to really get the ball rolling.
Nothing to choose between Baird and Selby
At world number 59, Sam Baird is making a surprise last sixteen appearance, but he proved that he was not making up the numbers against world number one Mark Selby as they also exchanged frames.
Seven of the eight frames produced half centuries, with Baird top scoring with a century in the sixth frame, as the session filtered out to a 4-4 draw. The pair will play their final two sessions on Saturday morning and evening.