Real Madrid concern over Chelsea target Roberto Carlos

Real Madrid officials are said to be frustrated by the recent lack of enthusiasm shown by Roberto Carlos regarding new contract talks.

Real president Florentino Perez has verbally offered the Brazilian international wing-back an improved contract to 2007. But Roberto Carlos is now indicating he doesn't want to re-sign at the present time.

"There has been contact about me renewing my contract at Real Madrid," the wing-back declared this week. "But I don't want to re-sign until my present contract expires."

Roberto Carlos' stance has surprised Real officials, which hoped to finalise his new contract this month.

The development comes after reports this week that Chelsea have made the Brazilian a mega offer to move to London in the summer.