The Super Eagles frontman moves to the Greek champions for a reported fee of €2.5 million, according to Complete Sports Nigeria, after ending his six-year stay with Fener.

"I want to let our fans know that I am here to play and give my best for the club," Emenike told Olympiakos's official club website.

"I will always give my best when I am on the pitch; for the club and its fans!"

The speedy, powerful frontman endured a testing spell in Turkey after moving to Fener for a second spell from Spartak Moscow in 2013.

He had originally moved to the Super Lig heavyweights from Karabukspor in May 2011, but was offloaded to the Russian side two months later after becoming involved in a match-fixing scandal.

The 30-year-old struggled to recreate his impressive Spartak goalscoring form in Turkey, and his time in Istanbul was affected by controversy.

In March 2015, he forced his own substitution after being booed by his own fans during a match against rivals Besiktas, and was subsequently sent on loan to Al Ain and then West Ham United.

Emenike was part of the Nigeria side that won the Africa Cup of Nations in 2013 and competed at the 2014 World Cup, but he announced his retirement from the international fold in October 2015 for the sake of "national peace."