However, Gallagher has said that Craig Pawson made the correct decision in opting to wave play on in both situations.
On Valencia, Gallagher told Sky Sports News: "Someone said to me on Saturday the ball's come a long way. The ball has come a long way but his arm is very, very tight to his body.
"It's struck his arm, there's no doubt about that. But I don't think there was any intention to handle that ball."
On Fellaini, Gallagher added: "I think Mane actually goes into the back of him. I think Mane puts his leg in, he puts his leg down and I'd have been surprised if that had been given. I think they just collide."