Five talking points from Celtic's defeat at Aberdeen; featuring Deila and Kazim-Richards

Celtic lost 2-1 away at Aberdeen on Wednesday night.

Sviatchenko endures a hit-and-miss first start

Danish international defender Erik Sviatchenko arrived at Celtic from Midtjylland in the January transfer window, and arrives with a strong reputation. Wednesday night was his first start as a Celtic player, and it was something of a rollercoaster ride. Whilst he shackled Adam Rooney with tight marking, he was also completely out of position for Aberdeen's second goal and almost gave away a second half penalty. The Dane has talent, but he will be hoping there is more to come after an up-and-down night at Pittodrie.

Kazim-Richards show he could be useful

Another new signing, striker Colin Kazim-Richards only arrived from Feyenoord on deadline day, but was brought on at half time against Aberdeen, with Celtic desperately needing another goal threat. The 29-year-old used his physicality to offer Celtic a focal point in attack, and he had a couple of bright moments in an otherwise tepid second half display from the Bhoys. There's clearly an edge to his game, and if Deila finally decides to play two up front, Kazim-Richards and Griffiths could cause problems.

Celtic need Patrick Roberts involved quickly

One of Celtic's real problems was a lack of spark in the final third. There was a lack of pace, a lack of drive, and a lack of willingness to try something different. James Forrest came on as a substitute to try and provide that, but that didn't work, whilst Stuart Armstrong, Callum McGregor and Gary Mackay-Steven all struggled. New signing Patrick Roberts, meanwhile, wasn't selected in the squad after joining on loan from Manchester City, but he could be what Celtic need. The 18-year-old is fearless, possesses pace and electric dribbling ability, as seen during his time at Fulham. Given the chance, Roberts could give Celtic something that they were desperately missing against Aberdeen.

Aberdeen prove the title race is wide open 

Whilst Aberdeen have sat in second place for virtually the whole season, but few have actually taken their pursuit of the title seriously, given the gulf in budget between themselves and Celtic. With a second home win over the Bhoys this season though, Derek McInnes has proven that the Dons deserve to be considered as a legitimate title rival, and they now sit just three points off top spot. With Deila under pressure and Celtic off the boil, Aberdeen are right in the race; write them off at your peril.

Deila: time to go?

The big talking point from the game was undoubtedly surrounding Ronny Deila's future. The Celtic boss has been picking up critics on a weekly basis, and after his side were dumped out of the Scottish League Cup by Raith Rovers on Sunday, it was another torrid evening for the Norwegian. Fans are baying for blood, and want Deila gone. After that defeat to Aberdeen, the Bhoys board at least have to consider replacing Deila in order to make sure that they win the league and have a chance of Champions League success, as that looks a distant dream right now.

Should Celtic part ways with Deila?

Register for HITC Sport - Daily Dispatch