Mark Allen battled illness to reach the second round of the Dafabet World Championship at the Crucible.
Allen also suffered from blurred vision as he beat Michael Holt 10-4, winning five successive frames to quickly wrap up his clash with Holt, with a 65 in the final frame the only break of note in a low-key second session.
Antrim’a Allen revealed he had sought treatment for food poisoning in the lead-up to the match starting on Tuesday and had struggled to see his shots clearly.
"I've got a few days to rest now," he said with relief. "I've had a bit of food poisoning, haven't been feeling too good the last few days."
"It's the World Championship. They'd have to scrape me off the table, no matter how bad I feel" - Mark Allen
"An hour and a half before the match yesterday I was in the NHS walk-in centre, trying to get treatment.
"At times out there I couldn't see the balls, I had blurred vision. I wasn't able to see anything more than three feet away, it was a guess. Thankfully I managed to guess right on a few."
But he added: "I would never pull out, no way, it's the World Championship. They'd have to scrape me off the table, no matter how bad I feel."
Holt himself was "heartbroken" after again failing to fulfil the potential he is confident he possesses.
"I couldn't have done any worse in my career than I've done, which is disappointing to say the least," he said.
"I mean that in a positive sense, that I feel like I can play a little bit, but obviously I never have - that's why I've never won anything."