The Senegal international will continue with his professional career at the Estadio de la Ceramica having left the Red and Whites
Reigning Europa League champions Villarreal announced the signing of Boulaye Dia from Ligue 1 side Reims on Monday evening.
The 24-year-old forward teamed up with the Yellow Submarine after representing the Red and Whites for three seasons at the Stade Auguste-Delaune.
Signed for an undisclosed fee, Dia was handed a five-year contract after passing his medical test under the supervision of ASISA. That will keep him at the Spanish elite division side until 2026.
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"Villarreal CF have reached a transfer deal with Stade Reims for French-Senegalese striker Boulaye Dia, who will wear yellow for the next five seasons," a statement from the club read.