Andriy Yarmolenko is understood to be the subject of a potential transfer to Everton

Everton have agreed a £15m deal to sign forward Andriy Yarmolenko from Dynamo Kiev, according to Sky sources.

It is understood contact has been made between the clubs and talks remain ongoing over the transfer.

It is believed the Ukraine international, who scored in Dynamo's 5-2 win over Everton in the Europa League last season, has a buy-out clause in his contract.

After the match last year, Everton manager Roberto Martinez said Yarmolenko was a 'constant threat to his side' and would be 'a success in the Premier League'.

Yarmolenko, who signed from Desna Chirnihiv in 2006, broke into Dynamo's first team a year later after impressing during a spell with the club's second XI.

The 25-year-old has scored 19 goals in 49 appearances for Ukraine.