As players paid their tributes on the field and beyond, it emerged that Bolton may decide to pull out of the competition to avoid a harrowing return to Tottenham.
Muamba's fiancee has urged everyone to keep praying for the Bolton star to recover.
The midfielder spent a second night on a life support machine at the London Chest Hospital on Sunday.
The football world has united in support for Muamba - and his 27-year-old partner Shauna, who runs a successful Caribbean food catering business and got engaged to the footballer on Valentine's Day, took to Twitter to write: ''2 everyone out there thank u so much for all the love and support collectively as a family we appreciate it all. Plz continue 2 pray 4 fab x.