League Two side AFC Wimbledon are hoping to extend West Ham defender Callum McNaughton's loan spell at Kingsmeadow.
But assistant manager Stuart Cash fears the Hammers may want the 20-year-old centre-half back at Upton Park following a spate of injuries.
McNaughton has started 11 matches for the Dons but his current two-month stint comes to an end next Tuesday.
"We need to get on the phone to West Ham," Cash told the Epsom Guardian.
"If we could extend his loan we would like to but it is up to West Ham and they lost a couple of centre-backs in their game on Tuesday night."