Such is his standing in the Premier League, it's very difficult not to talk about Chelsea striker Diego Costa. Even when he's not playing well.

On his game, the Spaniard is virtually unplayable and proved crucial to the Blues' march back up to the summit of the Premier League, a competition they now look like winning.

Still, as ever with the La Roja ace, not all has been happy families. He's been rather quiet of late, worryingly so in fact. Though his downturn in form cannot be directly attributed to the money-spinning offer he's thought to have received from the Chinese Super League in January, he's not been himself recently.

Or is this the norm?

Costa, good as he is, has a history of failing to produce in the second half of a campaign, as recently as the season in which he helped Chelsea to the title in 2014/15.

So, what exactly going here? Does he need a move away?

Watch below.

https://video.footballfancast.com/video-2015/diego-goals.mp4