Celtic manager Ronny Deila has told the club's Twitter account that some Bhoys players have been giving new signing Scott Allan stick over his arrival.
Allan, 23, completed his move from Hibernian to Celtic on Friday night after a controversial summer surrounding his future with the Scottish Championship club.
The midfielder had been a target for his boyhood club Rangers, who saw three bids rejected for the former West Brom man, as reported by STV.
However, Allan has instead joined Rangers' Old Firm rivals Celtic on a four-year deal, and he will be looking to make his debut shortly.
Celtic face Malmo in the Champions League on Wednesday, and whilst it may be too early for Allan to be placed into the starting line-up, manager Deila told the club's official Twitter account that Allan is in contention to play a part, whether that is as a substitute or from the start.
Deila also noted that some Celtic players have been poking fun at Allan upon his arrival, most likely due to those links with Rangers - but the Norwegian also added that they were merely jokes, with Allan impressing in training so far.
RD: "Some people have been giving him stick. You can guess who it was but I won't answer! But this is no problem, just funny." #UCL (MH)— Celtic Football Club (@celticfc) August 18, 2015
RD: "He's a football player and we have seen that in training already, happy to get him into the squad." (MH)— Celtic Football Club (@celticfc) August 18, 2015