The £32 million transfer from Atletico Madrid has been called an "animal", but now he's a "streetfighter".
The penalty-box predator was labelled an "animal" last season by Arsenal manager Arsene Wenger and now, on the advent of a campaign on four fronts, the 25-year-old has been called a "streetfighter".
Bleacher Report columnist Stan Collymore made the comparison when commenting on the club's chances in Group G of the Champions League which are, incidentally, quite high.
The Blues have been drawn with FC Schalke, NK Maribor and Sporting Lisbon, providing trophy-hunting Chelsea with what should be a bankable progression to the latter rounds.
"[Group G is] such a simple group for Chelsea," wrote Collymore.
"They've added in key positions and have more creativity with Cesc Fabregas onboard. Diego Costa, a streetfighter of a striker, is also looking good.
"Schalke, Sporting and Maribor are B-rated sides," he added. "They'll take points off each other, but it's anybody's guess who'll come second behind Chelsea."
Jose Mourinho's West Londoners are first tasked with Premier League duty before their European campaign, with a fixture away at Everton looming for tomorrow, Saturday.
Fears that Costa has been sidelined for three months were allayed when the Brazil-born Spaniard was named in the match-day squad for the trip to Everton.
But it begs the question… in the streetfighter's absence, would there be a chance Chelsea could get knocked out [of Europe]? If so, when…
How far do you think the streetfighter can take Chelsea in the Champions League?