Dimitris Nikolaou

Olympiacos

On 29 January 2017, Nikolaou made his debut with the club in a 2–1 away Super League win against Veria. A month later, he scored his first goal in a 2–0 Greek Cup win game against Aris. On 18 October 2017, Nikolaou scored an own goal and headed goal for his team in a 3–1 away loss in the 2017–18 UEFA Champions League group stage against Barcelona.

Loan to Empoli

On 28 January 2019, the 20-year-old Dimitris Nikolaou departed Piraeus, signing for Serie A club Empoli on loan for the remainder of the 2018–19 season, with a purchase option at the range of €3.5 million. This season, Nikolaou has largely been sitting on the sidelines with Olympiacos, only participating in one Greek Football Cup match. The young defender is regarded as a prospect for the future and will hope to receive regular playing time with Empoli. On 15 April 2019, he made his debut with the club in a 0–0 away draw game against Atalanta.

Empoli

On 2 June 2019, Empoli activated the option of the 20-year-old international defender, who reportedly was worth €3.5 million. Nikolaou played in four games at Campionato, and the leaders of the Italian club decided to activate the option of the young Greek defender despite their relegation. Nikolaou signed for four years for an undisclosed fee. The announcement from the Italian club stated: "Empoli announces that he has exercised the right to buy, and signed the young international Dimitris Nikolaou from Olympiacos."

Spezia…

As of 1 May 2024 (UTC).

Club

Empoli

Serie B: 2020–21 Olympiacos

Super League Greece: 2016–17 OFI

Greek Super Cup: 2026