MADRID, Jan 5 (Reuters) - Goals from centre back Rafael Marquez and striker Samuel Eto'o gave Barcelona their third away win of the season when they beat Real Mallorca 2-0 in the Primera Liga on Saturday.The victory left second-placed Barca four points behind Real Madrid, who host an out-of-sorts Real Zaragoza on Sunday. Third-placed Espanyol entertain fellow high-fliers Villarreal in Saturday's late match. 'Mallorca made it very difficult but it was an important win for us,' Barca coach Frank Rijkaard told reporters. Barca went into the game under heavy pressure, having lost 1-0 at home to arch-rivals Real Madrid in the final game of last year, and made a sluggish start against the islanders who were sharper for much of the first period. Mallorca striker Daniel Guiza gave the visitors an early scare when he sent a shot skidding past the post while midfielder Angelos Basinas lashed the ball wide midway through the half. The hosts continued to look dangerous at the start of the second period but Barcelona snatched the lead after 63 minutes when Marquez took advantage of slack marking to head a corner past keeper German Lux. Substitute Thierry Henry, making his first appearance in over a month, went close to extending the lead before Eto'o sealed the win two minutes into added time. The former Mallorca player blasted home a powerful long-range effort after good work by Bojan Krkic on the left. A rampant Espanyol side had their home game against Villarreal tied up by the interval courtesy of three first half goals. SKipper Raul Tamudo opened the scoring in the ninth minute racing clear to fire past Villarreal keeper Sebastian Viera. Valmiro Lopes Rocha made it two with a great reaction flick after Luis Garcia's free-kick cannoned back off the bar. And Tamudo wrapped up a superb opening half when he nodded in from close range on 36 minutes. The second half was less eventful but Tamudo was denied a hat-trick when the linesman failed to spot that his effort had crossed the line. Espanyol remain in third, one point behind city rivals Barcelona.