Chelsea boss Andre Villas-Boas has revealed the club are struggling to agree personal terms with Gary Cahill, saying they are 'miles apart'.
Bolton confirmed on Friday that they had agreed terms with the West London giants in a deal believed to be worth around £5million.
Cahill has already held talks with Chelsea, but Villas-Boas has confirmed that things are not going as well as planned.
"We're still miles apart regarding agreement with the player," he said, warning the Blues had alternative targets.
"We'll continue to monitor this situation as we continue to monitor others."
Villas-Boas was confident, however, an agreement would eventually be reached and hailed the qualities Cahill would bring to Stamford Bridge.
"Gary has been this season involved in a fighting struggle with Bolton and a fight for position in the league," he said.
"I think his technical attributes are immense. His pace is fantastic as well.
"There are weaknesses and they are also related to the collective weaknesses of Bolton.
"He's a player that at international level has been playing well.
"He can add to this squad or any squad in the Premier League."
Villas-Boas revealed midfielder Josh McEachran would not be joining Bolton on loan but could move to another club.