Suarez says Liverpool must keep Man City target Skrtel
Skrtel has been linked with Manchester City in recent days.
"Martin is a brilliant defender and this season I think he has been at his best. There are many good ones I have played against but the most difficult would be Thiago Silva from Milan. He is a very good defender and is always a tough opponent. He is quick, strong and all-round a very good player," said Suarez to liverpoolfc.tv.