Everton manager Roberto Martinez has hailed the strike partnership of Romelu Lukaku and Arouna Kone.

The pairing have scored 11 out of Toffees' 19 goals in Premier League this season.

"Their relationship is vital. When you have a defensive unit where the opposition are going to mark one of the two strikers with precision, the other one is going to benefit by having a little more space," Martinez told Everton's official website.

"That has been the case this season. Sometimes it has been the other way round - Arouna grabbed their attention and Rom [Lukaku] has had a bit more space. The understanding that they have between them has been important."