With Muamba set to spend at least another 24 hours in intensive care after medical staff took two hours to get the 23-year-old's heart breathing on its own following his collapse during an FA Cup sixth-round tie with Tottenham on Saturday, former team-mate Gary Cahill led the tributes.
Cahill was a team-mate of Muamba's for two-and-a-half years before leaving Bolton for Chelsea in January. The bond between the pair remains strong and, after scoring in Chelsea's FA Cup win over Leicester at Stamford Bridge, Cahill revealed a T-shirt with the message 'Pray 4 Muamba' printed on it.
It is a message that has been repeated by so many over the past 24 hours as concern for Muamba's condition continued. Supporters and players at Sunday's Premier League games between Wolves and Manchester United and Newcastle and Norwich also combined in a minute's applause before kick-off in the two matches.
Supporters at Anfield watching the FA Cup sixth-round tie between Liverpool and Stoke City also chanted Muamba's name.
And the tributes did not stop in England - Juventus midfielder Andrea Pirlo dedicated his side's win to the midfielder, while Real Madrid players wore t-shirts supporting both Muamba and Barcelona defender Eric Abidal, who will undergo a liver transplant.
As a steady stream of fans headed to the Reebok Stadium to lay flowers and offer their support to Muamba, the former Arsenal and Birmingham player was visited by members of his family on Sunday morning and Bolton officials and players, including manager Owen Coyle, and other famous footballing names later.
"From our end, and on behalf of the family, we want to say a big thanks to everyone," said Coyle on Sunday. "We have been inundated by good messages, everyone praying for Fabrice which is very important. It has been a real source of strength for the family. We know how difficult a time it is for everyone.
"I can't really quantify it (the support). It has been incredible, not just from the football world, from everyone."