Sampdoria started their Serie A campaign with a 1-0 win at Empoli, who finished the match with 10 men.A goal from Colombia forward Luis Muriel on 37 minutes proved the difference between the two sides.Sampdoria, who knocked Bassano Virtus out of the Copa Italia in their first match of the new domestic campaign last weekend, were rewarded for their positive start at the Stadio Castellani when Muriel scored at the near post just before half-time.A late challenge by Massimo Maccarone on Sampdoria forward Edgar Barreto saw the Empoli forward shown a straight red card with six minutes left.ends