Negotiations have become complicated after they raised the price to £27million

The Goodison Park club had hoped to conclude a £25million deal on Tuesday

Everton's pursuit of Cenk Tosun is in the balance after Besiktas raised their price

Everton's pursuit of Cenk Tosun is in the balance after his club Besiktas raised their asking price for the striker.

The Goodison Park club had hoped to conclude a £25million deal, which is inclusive of add-ons, on Tuesday, after director of football Steve Walsh headed out to Turkey at the weekend to finalise terms.

However, negotiations have become complicated after the Turkish side raised the price to £27million.

Everton's pursuit of Cenk Tosun is in the balance after Besiktas raised their asking price

Negotiations have become complicated after the Turkish side raised the price to £27million

Everton are reluctant to improve their deal knowing that Tosun has already flown to London in the hope he can complete a record transfer for a player moving from a Turkish club.

'We've done all we can, so I would presume we'll know in the next 24 hours if it's been successful or not,' manager Sam Allardyce said.

Tosun has been a key figure in Besiktas's Champions League run this season and they face Bayern Munich in the last 16.

Allardyce remains keen to add Steven Nzonzi from Sevilla too and a left-sided defender.

Tosun has also been a target for Newcastle and Crystal Palace but Everton's financial clout and ambition had convinced him that a move to Merseyside is for him.