With the sale of Steven Naismith during the window, it was almost inevitable that Roberto Martinez would be in the market for another attacking option.

Niasse has joined Everton from Lokomotiv Moscow and he will be hoping that he can make an immediate impact as the Toffees look to stunt their poor form of late.

Martinez is coming under increasing pressure from the Goodison faithful and he will be heading towards the sack if his latest big money acquisition flops dramatically in the first few months of 2016.

Romelu Lukaku and Arouna Kone now have an extra forward to assist with the goal scoring responsibility at the Merseyside club, but some fans will be wondering why Martinez didn't use the budget to strengthen their struggling defence. Niasse might not help with keeping clean sheets, but the forward is likely to improve the Toffees chances of out scoring the opposition.

Here are FIVE things you must know about the new man...

Out wide..

Much like Naismith, Niasse can play out wide as well as a central striking option.

Mirallas and Deulofeu should be the starters for Martinez's side on the wings, but Niasse is likely to provide goals from the wing more regularly and could be used on the left hand side when the Toffees are looking to dominate.

Seven years your junior..

kone

If Lukaku is to remain as the first choice centre forward, Everton definitely need an improved backup to the big Belgian.

Arouna Kone has often been used with, rather than instead of, Lukaku this season and, at 25, Niasse is seven years younger than the ex-Wigan striker.

Eye for goal

13 in 23 this season has made Niasse a crucial player for Lokomotiv Moscow and a return like that for Everton would see him pushing Lukaku for the first choice berth.

Road runner

The African forward is renowned for his pace and power - much like Lukaku - and will be a dominating force for many defences.

Threatening on the counter attack, or the ex-Lokomotiv man can be used as a focal point.

Interest across Europe

Niasse is thought to have had interest from clubs across Europe, but he had his heart set on a move to the Premier League.

Is this because of money? Or did he just fancy the drizzly weather?