Speaking on the Stick to Football podcast, Keane said: "What didn't help Scott was it was him and Fred together. It just wasn't a good combo. 'I know Ole [Gunnar Solskjaer] praises both of them - which is beyond me - I always thought there was something in Scott. He had more than Fred going on, but as a partnership it didn't work, it wasn't happening, United weren't competing in midfield.
"It tarnished him a little bit, 'McFred' wasn't it. He's added to his game, to be fair to him. He's always had a goal in him but he's got that up to another level. If he wasn't scoring the goals at Napoli we wouldn't be talking about him. But you can't keep talking about players who leave a big club and say we should have kept them. You can't keep everyone. I think McTominay could have been in the group, 100%. But playing every week? I'm talking about the players you need to get United back to the top. They haven't brought in better which is the problem for the club. United's recruitment has been that poor that you still talk about former players."