hopes of staying in the Premier League on the Greece international, they were relegated in May 2014. Due to various injuries and fitness problems, Mitroglou played in only two more Premier League matches before the end of the 2013–14 season, starting only one, away against Cardiff City. Loan to Olympiacos On 31 August 2014, Mitroglou returned to Olympiacos on a season-long loan from Fulham. He made his debut on 13 September, replacing Dimitris Diamantakos in the 55th minute of a 3–0 home win over OFI Crete. Three days later, he scored what proved to be the game winner in a 3–2 win over Atlético Madrid in the UEFA Champions League group stage. Benfica On 6 August 2015, Mitroglou joined Portuguese champions Benfica on loan until the end of the season. He made his debut three days later, replacing compatriot Andreas Samaris for the final 18 minutes of a 0–1 loss to rivals Sporting CP in the 2015 Supertaça Cândido de Oliveira at the Estádio Municipal de Aveiro. In their first match of the Primeira Liga season against Estoril, he opened the scoring in a 4–0 win at the Estádio da Luz. On 11 September, he scored in each half of a 6–0 win in the league against Lisbon neighbours Belenenses. On 23 January 2016, Mitroglou scored with a backheel goal in a 3–1 win against Arouca, and on 3 February, he scored a hat-trick against Belenenses in a 0–5 away victory. It was his first hat-trick in the season, scoring for the fifth consecutive match in a row. On 13 February, he opened the score in a 2–1 home loss against rivals Porto, struggling for the win before goalkeeper Iker Casillas made a save at close quarters to stop him from scoring the equalizer. One week later, he scored for the seventh match in a row by opening the score in a 1–3 win at Paços de Ferreira; at the final whistle, a Benfica supporter entered the field and knelt before Mitroglou, and then tried to shine his boots with a scarf. On 5 March, Mitroglou scored the only goal in the Lisbon derby at Sporting CP's Estádio José Alvalade, giving Benfica the lead in the league, ahead of their opponents. Later on, he scored a brace in a 5–1 home win against Braga in the Primeira Liga on 1 April, increasing his tally to 18 goals in the league,