Spanish champions Barcelona have exercised the buy-back clause to re-sign midfielder Denis Suarez from Villarreal, the Catalan club announced on Monday. The 22-year-old has signed a four-year contract with an option of extending it for a further year after Barcelona agreed to pay 3.25 million euros ($3.62 million) to re-sign Suarez, whose buy-out clause has been set at 50 million euros. The attacking midfielder made 48 appearances during his one season at the El Madrigal and played a key role in helping the club finished fourth in La Liga to earn a Champions League playoff spot and reach the Europa League semi-finals. The former Manchester City player will undergo a medical on Tuesday and will be unveiled on Wednesday.