Career
Bundesliga club Karlsruhe as a forward. He is often referred to as "the Spartan". Olympiacos
Diamantakos started his career at Atromitos Piraeus, from which he moved to the youth teams of Olympiacos in 2009.
= Loan spells In 2012, he moved to Superleague side Panionios on loan.
In January 2013 he joined Aris Football Club on loan. He made 13 appearances without scoring any goal.
In June 2013 he joined Ergotelis on loan. He did his best season so far by scoring 10 goals in 27 appearances in the league and in the cup.
Back to Olympiacos
Following his loan spell at Ergotelis, Olympiacos decided to keep him for the 2014–2015 season.
Diamantakos made his debut on 23 August 2014 with Olympiacos in the Superleague on a home game against Niki Volos and managed to score his first goal in the 28th minute with a close range strike. In February 2015, according to Russian reports, Arsenal Tula was close to signing Dimitris Diamantakos. With the Russian transfer window still open the striker reportedly was in the club"s shortlist.
Overall, he had little playing time in his first season with Olympiacos, having to settle for a role mainly on the bench.
He scored 4 goals in 17 appearances across all competitions helping his club on its route to winning the Greek Cup. = Loan to Karlsruhe In August 2015, Diamantakos joined Karlsruhe, again on loan.
On 12 December 2015, he scored his third goal in the league, helping his club return to winning ways against SpVgg Greuther Fürth. Karlsruhe
On 18 February 2016, Karlsruhe completed the permanent signing of the Greek striker for a reported transfer fee of €1 million.
On 20 February 2016, he scored the second goal helping his club to escape with a 2–2 home draw against Eintracht Braunschweig after teammate Ylli Sallahi had been sent official
Diamantakos is a Maniot. Diamantakos made his international debut for Greece on 7 September 2014 against Romania. Olympiacos
Superleague Greece: 2014-2015
Greek Football Cup: 2014-2015.