Ronny Deila has been discussing both forwards while speaking to reporters at a press conference.
The on-loan Manchester City striker's contract with the Premier League champions expires at the end of the season, leaving him to negotiate potential pre-contract deals with any club he wants.
Celtic, the club he is on loan at, appear the main port of call when it comes to negotiations. But the 22-year-old striker is yet to commit to any new deal, with contract talks taking their time.
And Celtic boss Deila admits there will no be nothing final this month as Guidetti wants to explore all of his available options.
RD on Guidetti: "He wants to wait to see what his options are so there won't be anything final this month."— Celtic Football Club (@celticfc) January 22, 2015
Meanwhile, the Norwegian also confirmed that Aleksandar Tonev will be part of his first-team plans after serving out a suspension for racial abuse.
The winger, also on loan at the SPL champions from Aston Villa, had been banned for seven games but is nearing his return.
RD on Tonev's return: "He will be available soon. He's in my first team plans."— Celtic Football Club (@celticfc) January 22, 2015
Celtic beat Motherwell 4-0 last night to return to the top of the SPL standings. Deila's men are now one point clear of second-placed Aberdeen, with a game also in hand over the Dons.