Andy Robertson has revealed the hidden impact Adam Lallana has been making at Liverpool - and believes the midfielder's dramatic Old Trafford intervention can kickstart his season.

Lallana came off the bench to score a vital equaliser for the Reds five minutes from time to earn a 1-1 draw at Manchester United on Sunday.

The goal, which means the European champions are six points clear at the top of the Premier League table, was the 31-year-old's first for Liverpool since May 2017.

The England international has been hampered by injuries that have restricted him to just 37 appearances - of which only 10 have come as a starter - in two-and-a-half years.

And Robertson, who put in the cross for Lallana's leveller, has explained the difference the strike could make for the player.

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"Amazing, because he struggled with injuries, he has come back and got injured again and stuff like that, so he has struggled," said the Liverpool left-back.

"Adam feels it as well because you can see when he is injured. Nobody likes it when you are injured, but he managed to pick himself up, he is now fit and he has been unbelievable this season in training. He has been giving 100%.

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"In the changing rooms before games he is one of the loudest. He could easily be quiet as he is on the bench and not playing. But the way he has conducted himself - and, to be fair, (along with) all of the lads who haven't played as much as they would have wanted - Adam is a top, top professional and a top, top guy.

"I'm absolutely delighted for him that he could get on the end of it.

"When he came on I thought he was brilliant and I thought he changed the game. To get that goal, it will do a world of good for him and his confidence and I think we'll see a lot more from him."

Liverpool were below their best at United but managed to extend their unbeaten Premier League run to 26 games.

And Robertson, speaking to liverpoolfc.com, added: "Would we have taken a six-point lead? Of course we would have, not even a doubt.

"We have had tough games and we have got more coming up, so we need to focus on what's in front of us because we didn't play at our best.

"But we need to try to get back to our best and put in good performances that will win us games. The season isn't won in October, so let's see where we are in May."