Liverpool are set to make a £6.5million bid for West Ham's Winston Reid.
New Zealand international centre-back Reid, 26, is out of contract at the end of the season.
He rejected a new four-year deal to stay at Upton Park and now Liverpool will test the Hammers' resolve to hang on to him.
West Ham are likely to insist on a fee of £6-£7m, but Liverpool boss Brendan Rodgers can meet that demand.
If Reid goes, the Hammers will enter the race for Croatian defender Vedran Corluka.
The former Tottenham defender is now at Spartak Moscow and will this week go to Spain for a warm-weather training camp with the Russian team.
Corluka, 28, is available at £4.5m but West Ham will face stiff competition from three Premier League rivals.
West Brom boss Tony Pulis is anxious to bolster his defence in a bid to steer his new club away from the relegation zone. Everton are also keen, and under-pressure Hull manager Steve Bruce is also monitoring the situation.
Source: Daily Mirror