Celtic could do with another option at centre-back but they are running the risk of missing out on Lens defender Jean-Kevin Duverne.
Celtic are reportedly pursuing Chelsea's Charly Musonda.
Dedryck Boyata has become an important part of Brendan Rodgers' Celtic side lately.
Brendan Rodgers’s Celtic won against St Johnstone at Celtic Park in the Scottish Premiership at the weekend.
Patrick Roberts is currently on loan at Celtic from Manchester City.
Celtic's Dedryck Boyata was in talks with Anderlecht in January - and Kara Mbodji moving to Crystal Palace may jumpstart the deal.
Boyata is now a big favourite of Rodgers at Celtic - but the former Belgium assistant doesn't share the same admiration.
Erik Sviatchenko and Dedryck Boyata struggled in Celtic's draw with Rangers at the weekend, so perhaps Brendan Rodgers should consider a change?
Dedryck Boyata was handed a starting place for Celtic when they took on their Glasgow rivals, Rangers, yesterday.
Few expected Dedryck Boyata to still be a Celtic player by January let alone a regular starter.
Brendan Rodgers' Celtic side extended their lead over Mark Warburton's Rangers to 25 points on Wednesday and Bhoys supporters are showing no mercy to one particular Ibrox star...
Manchester City have allowed another talented Belgian international to move to Celtic, with Dedryck Boyata completing a permanent transfer on Tuesday.
The 24-year-old has come in for his compatriot at Celtic Park, and is more than able to fill his boots according to O'Halloran.