Arsenal title winner Paul Merson says opposition defenders will now be targeting Liverpool dazzler Luis Diaz.
Merson, believes that Diaz' promising start has already put him firmly on the radar of his opponents.
Writing in the Daily Star, Merson said: "Luis Diaz has been so outstanding for Liverpool so far that he is already a marked man.
"He's come in and caught everybody on the hop. Defenders wouldn't have watched him much or known much about him and he's taken them by surprise.
"Now all of a sudden he's on the radar and this is when you've got to produce. He's in opposition team talks now.
"When teams are discussing how to set up against Liverpool and who to stop, it's not just Salah and Mane and Jota they're talking about. It's Luis Diaz.
"So it's a different game for him now and this is where we are going to see what he's made of. The top players carry it on.
"He will be a marked man. I don't mean in a vicious way but teams will adjust and try to stop him."
Merson added: "What I've seen so far, I've been majorly impressed. His first touch, his movement, his team play, his work ethic, finishing, his skills. Everything about him has been outstanding.
"He's going to be massively important to them now for the rest of the season because they don't have a chance of winning a Quadruple unless everyone is on top of their game."
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