Winger who joined Chelsea in 2013 and debuted with Ghana's national team in 2012.
He began his professional career with Porto in 2011 after spending two years in the club's youth set-up.
He appeared in 27 games while on loan to Rio Ave during the 2011-12 season.
He was born in Ada Foah, Ghana.
He and midfielder Kwadwo Asamoah became teammates on Ghana's national team.