International Champions Cup: Real Madrid 3-7 Atletico Madrid - 5 talking points

#2 Diego Costa still remains an enigma

Costa scored four goals and received a red card

Between 2014 and 2017, Diego Costa was one of the best strikers in the world, helping Atletico Madrid and Chelsea to numerous titles in this time.

His displays led to a public battle for his services on the international scene, as Brazil and Spain wooed him to represent them, but since his final season at Chelsea, the 30-year-old has been a shadow of himself.

However for all of his goalscoring prowess, the Spanish international is very much a classic hothead, ready to blow up at the slightest provocation and this has been a constant issue for him throughout his career and has led to numerous clashes with opposition players as well as managers.

Having spent the majority of last season on the treatment table, Costa found himself horribly off form and the coming campaign was one where it was expected that he would step more so due to the arrivals of Alvaro Morata and Joao Felix.

He issued a perfect response against Real Madrid, opening the scoring inside the first minute in what was to end up being a four-goal haul.

It would not be a complete Costa performance if there was no customary controversial incident and that moment came in the 65th minute from an issue that did not concern him at all.

Dani Carvajal was challenged roughly by Thomas Lemar and the Spanish defender reacted angrily only for Diego Costa to come out from nowhere and took charge of the ensuing scuffle, fancying himself an Avenger to defend his teammate's honor.

Unsurprisingly, both he and Carvajal received their marching orders for their roles in the melee and Diego Simeone would be hoping Costa can keep his temper in check.