Ronaldinho's move to AC Milan could be in jeopardy as the Italian club have failed to agree a transfer fee with Barcelona during preliminary talks.
The 28-year-old Brazilian playmaker, who has been linked to Manchester City, has agreed personal terms with Milan.
However, the European champions' chief executive Adriano Galliani told Sky Italia: "We had a conference call. The figures haven't fallen into place.
"Maybe Ronaldinho won't come and a main striker arrives."
Former world player of the year Ronaldinho has had a difficult season at the Nou Camp.
He has been dogged by injury and fitness problems, starting only 13 of Barcelona's 30 league games, and earlier this month a leg injury ruled him out for the rest of the campaign.
606: DEBATE
Milan need to boost their attacking options as Brazil striker Ronaldo is sidelined for a lengthy period with a knee injury, while 34-year-old Filippo Inzaghi is in the twilight of his career.
However, they face competition for Ronaldinho's signature as city rivals and Serie A leaders Inter Milan are also reported to be interested in the former Paris St Germain player.
Galliani said he did not believe Ronaldinho would be deterred by the prospect of playing in the Uefa Cup next season. AC Milan are currently fifth in Serie A, outside a Champions League place.
"Ronaldinho went to Barcelona when they were in the Uefa Cup. It happens to all the great European clubs, I hope it doesn't happen to Milan," added Galliani.
"Anyway, Ronaldinho is a Barcelona player, not a Milan player."
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