WEST Ham have made a �4m bid for Czech Republic defensive midfielder Radoslav Kovac. Gianfranco Zola has moved for the highly-rated 29-year-old Spartak Moscow player after hearing Scottish champions Celtic have expressed an interest.

WEST Ham have made a �4m bid for Czech Republic defensive midfielder Radoslav Kovac.

Gianfranco Zola has moved for the highly-rated 29-year-old Spartak Moscow player after hearing Scottish champions Celtic have expressed an interest.

Kovac, who can also play at centre-back, is also interesting Bundesliga side Hannover and Italian outfit Udinese.