Arsenal have signed midfielder Matteo Guendouzi from French Ligue 2 side Lorient.
Sky sources understand the fee for the 19-year-old will be in the region of £8m.
Guendouzi started his career at the Paris Saint-Germain academy before joining Lorient's academy in 2014.
He made his first-team debut for Lorient aged 17 in October 2016 and went on to make 30 appearances.
He is a France youth international, having represented them at under-18, under-19 and under-20 level.
Head coach Unai Emery said: "We are delighted Matteo is joining us. He is a talented young player and a lot of clubs were interested in him.
"He has big potential and gained good first-team experience last season with Lorient.
"He wants to learn and improve and will be an important part of our first-team squad."
Guendouzi is Arsenal's fifth signing of the summer, joining goalkeeper Bernd Leno, defenders Stephan Lichtsteiner and Sokratis Papastathopoulos and midfielder Lucas Torreira.