Playing catch-uppublished at 11:53 BST
11:53 BST
Allen 6-6 Zhang
Michael Emons
BBC Sport at the Crucible
Image source, Michael Emons
The first session between Mark Allen and Zhang Anda only saw eight completed frames, with time running out for the scheduled ninth one.
That meant they were already playing catch-up today, and a 46-minute frame in the opening frame on Sunday added to the time pressures they may be facing.
However, the next three frames were sealed in one main scoring visit to speed things up, firstly Zhang with a break of 74 in frame 10 and then Allen with a delightful 140 clearance, followed by another ton, this time of 109.
It is now the 15-minute mid-session interval and either player only needs four frames to win, so it could be over well before the cut-off.
But if it goes all the way, they may have to come back later on today.
The afternoon session starts at 14:30 BST, meaning they will not start any more frames in session one after 14:00 BST.
If any frames are left over, the pair would then come back after the evening session matches have been completed, going on the first table that comes available.