Career
He is 2.01 m (6"7") in height and 102 kg (225 lbs) in weight. He can play both the shooting guard and small forward positions. Nikolaidis possesses great shooting ability.
In 2004, he was a EuroChallenge finalist while playing with Maroussi.
He spent the 2007-2008 season with Egaleo. Nikolaidis moved to Trikala 2000 for the 2008-2009 season.
He then moved to AEK Athens. In September 2012, he joined New Basket Brindisi for a trial period.