Xavi Hernandez made six changes to the starting eleven opposed to the line-up opening up the unexpected Europa League draw against Galatasaray. The club legend turned manager thus showed the Catalan side’s quality in depth tonight – Barcelona swept Osasuna aside 4-0 at home with Ferran Torres’ first brace in 78 La Liga appearances.After winning seven of the previous eight home head-to-head encounters, the hosts were beaming with confidence from the very start and they were quick to extend their dominance over Los Rojillos. Ferran Torres scored Barcelona’s first goal of the night from the penalty spot – Nacho Vidal wiped out Gavi as he ran onto Sergio Busquets’ lofted pass into the box. This meant Torres opening Barcelona’s account for the second league match running.Osasuna’s chances of taking points from the Santiago Bernabéu and Camp Nou in the same campaign went to dust as Barca’s second and third goals followed without mercy. Ousmane Dembélé provided his sixth and seventh assists of the campaign – firstly helping Torres grab his second of the night, before allowing Pierre-Emerick Aubameyang to flick in at the near post from an incisive run. Less than 27 minutes of football and it was 3-0 already. From that point the hosts took their foot off the gas and pretty much waited for the half-time whistle. Just ten minutes after the restart, Gerard Piqué thought he had added a fourth but was ruled offside. Moments later he unfortunately had to leave the pitch due to receiving a knock.After a period of comfortable possession, substitute Riqui Puig stepped up to the plate. Two minutes after his introduction midway through the half, the midfielder reacted quickest following his saved initial effort to round Sergio Herrera, firing in the rebound with composure.Osasuna remain 11th despite having a night to forget and now failing to score in eight of their last 10 away league fixtures, and will be looking over their shoulder with the trailing pack of relegation battlers closing in. Meanwhile, Barça return to third in the La Liga standings with this result, leading Atlético Madrid on goal difference with a game in hand.LA LIGA – ROUND 28FridayAtletico Madrid – Cadiz 2-1 (1-1)/Joao Felix 3 – Negredo 45/SaturdayLevante – Espanyol 1-1 (0-0)/Gomez 80 – Puado 50/Granada – Elche 0-1 (0-1)/Fidel 11/Villareal – Celta 1-0 (0-0)/Parejo 64/Getafe – Valencia 0-0SundayRayo Vallecano – Sevilla 1-1 (0-0)/Bebe 46 – Delaney 63/Betis – Ath.Bilbao 1-0 (1-0)/Iglesias 20/Sociedad – Alaves 1-0 (0-0)/Zubimendi 70/Barcelona – Osasuna 4-0 (3-0)/Torres 14 pen, 21, Aubameyang 27, Puig 76/Monday23:00: (5.80) Mallorca (3.90) Real Madrid (1.60)*** odds are subject to change***