Seedorf is a doubt for Holland

Seedorf came on at half time on Saturday, but only lasted 15 minutes before being forced to leave the field.

The AC Milan midfielder made no signal to the bench before walking off the pitch and straight down the tunnel.

Holland coach Dick Advocaat said: "If it really is his hamstring he will be off the list for Euro 2004."

He added: "Clarence walked off after he felt a stinging pain in his upper leg."

Although an MRI scan on Sunday showed no significant damage to the muscle, Seedorf will have the injury examined again on Monday before the squad travels to Portugal on Tuesday.

Prior to Saturday's friendly against the Republic of Ireland, it was reported that Seedorf had demanded to play in central midfield during Euro 2004.

But he was again played out of position when brought on as a substitute at the Amsterdam ArenA, prompting rumours of a fall-out with Advocaat.

Should Seedorf miss the Euro 2004 finals, Advocaat may ask Uefa for special dispensation to name a replacement even though the official squad lists have been registered.