Diego Costa is the secret to Griezmann's success

The French striker is in flying form having scored seven goals in barely four days - a tremendous tally for a player whose season was starting to veer off-track. 

Griezmann flirted with the idea of joining Manchester United or Barcelona earlier in the season, but his clear intention to leave and substandard performances have been swapped for a footballing masterclass as of late. 

It seems Simeone new exactly what medicine to give his troubled striker: Diego Costa. With the Spaniard by his side, the Frenchman has been on fire. The seven goals and five assists he registered in the first 21 games of the season have been bettered in his last 13 matches.

Griezmann is enjoying the freedom that Diego Costa's presence on the pitch gives him. As the ex-Chelsea man fends off rivals, he offers Greizmann vital seconds to find space and deliver deadly blows. 

Costa's impact has been so significant that, in the 13 games that he's featured in this calendar year, Griezmann has bagged 13 goals and five assists. These clinical statistics keep Atletico in the running for La Liga and fuel the side's drive to lift the Europa League.