Liverpool are in talks to sign Greece left-back Kostas Tsimikas for 13m euros (£11.7m) from Olympiakos.
The Premier League champions have turned their attention to the 24-year-old after having a £10m bid for Norwich's Jamal Lewis rejected.
It is understood they were prepared to go to £12m for Lewis but the Canaries wanted significantly more.
Liverpool, seeking cover for Scotland captain Andy Robertson, had also been monitoring Tsimikas, 24.
The Greece international played for Olympiakos in a 1-0 defeat by Wolves in the second leg of their last-16 Europa League tie last week as his side went out 2-1 on aggregate.
He also played for them in their six Champions League group games earlier in the campaign as they finished third behind Bayern Munich and Tottenham.
After Olympiakos dropped down into the Europa League, he put in an impressive performance as his side won 2-1 at Arsenal and knocked the Gunners out of the competition at the last-32 stage.
Real Madrid left-back Sergio Reguilon, 23, was another option looked at by Liverpool.
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