The Trotters led twice thanks to Zat Knight and Martin Petrov but on both occasions they were pegged back by United, with Nani and Michael Owen grabbing the equalisers.
"Having lead twice, we were disappointed to give up those leads, but you have to give balance to the unbelievable individual quality they have," Coyle said.
Coyle was left to reflect on the golden opportunity Johan Elmander spurned before Owen struck, which surely would have sealed the Trotters' victory.
"That chance would never have happened if Johan hadn't taken the ball, driven 40 yards and beat three or four men," said Coyle.
"He was magnificent. He is a player playing at the top of his confidence. "On another day that ball would have rolled into the top corner. I am certainly not going to criticise a player who's given me everything and shown unbelievable quality as well."
Source: PA