Celtic manager Ronny Deila insists Virgil van Dijk does not want to leave the Scottish Premiership leaders in January.
Celtic boss Ronny Deila says keeping his best players will take priority over acquisitions in the transfer window.
Fulham have completed the signing of free agent Mickael Tavares on a short-term deal, a player Martin Jol knows well from his time at Hamburg.
The 29-year-old defensive midfielder worked with Cottagers boss Martin Jol during the Dutchman's spell as Hamburg manager.
Tavares, who spent the 2010/11 on loan at Middlesbrough, joins Fulham following his summer release by the Bundesliga club and has penned a short-term contract at Craven Cottage.
"I'm happy that I'm now officially a Fulham player and I'm looking forward to playing under Martin Jol once more," the Senegal international told the club's official website.
"The players and staff have made me feel welcome and I can't wait to get started with my new teammates."
Speaking about his new acquisition, Jol said: "Mickael is a typical holding midfielder and I'm delighted that we've been able to strengthen this area.
"He played for me when I was at Hamburg so I'm familiar with his qualities and he will prove to be a very good addition."