West Ham have made tentative enquiries about Inter Milan veteran Dejan Stankovic and Chelsea striker Romelu Lukaku, according to ESPN sources.
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Hammers boss Sam Allardyce is looking to sign an experienced leader for his newly promoted team and considered a move for Clarence Seedorf before being deterred by the Dutchman's £70,000-a-week wage demands.
Allardyce has now turned his attention to 33-year-old Stankovic, who is being tipped to leave the San Siro after eight years as Inter Milan boss Andrea Stramaccioni is looking to usher some of the club's youngsters into the first-team.
The former Serbia international, who played 102 games for his country before retiring in 2011, would add some much-needed maturity to West Ham in their first season back in the Premier League - though, like Seedorf, his wage demands could prove prohibitive.
The Hammers have also been linked to young Inter forward Luc Castaignos, who is leaving the club this summer, and Allardyce has a long list of potential transfer targets for the striker's role, including a potential loan move of Lukaku at Chelsea.
West Ham have told ESPN that they are testing the water with a multitude of potential transfer targets to discover which are the most realistic in terms of fees, salaries and availability.