Soccer-Atletico close on title after seeing off Elche

MADRID, April 18 (Reuters) - Atletico Madrid stayed firmly on course for a surprise La Liga title triumph when a Miranda header and Diego Costa's late penalty secured an unconvincing 2-0 win for the leaders at home to Elche on Friday. David Villa had a penalty saved six minutes after halftime at a raucous Calderon stadium and nerves were starting to jangle when centre back Miranda rose at the back post to nod a Jose Sosa corner powerfully into the net 18 minutes from time. Costa was felled by Elche defender Cristian Sapunaru, who earned a second yellow card and was sent off, in the 90th minute and the Brazil-born forward stroked the ball into the net for his 27th La Liga goal of the campaign, one fewer than leading marksman Cristiano Ronaldo of Real Madrid. The victory stretched Atletico's lead over second-placed Real, whose game at Real Valladolid has been moved to May 7, to six points. Champions Barcelona, who host fourth-placed Athletic Bilbao on Sunday, are a further point behind in third. Under coach Diego Simeone, Atletico are mounting a genuine challenge to the dominance of vastly wealthier Real and Barca and are closing on a first La Liga title since 1996 when a team featuring Simeone won the domestic league and Cup double. If they win their next three matches they will be assured of the title by the time they run out at Barca's Nou Camp stadium for the final game of the season. Alicante-based Elche, promoted from the second division last term, are four points above the relegation places in 15th place. Atletico host Chelsea in a Champions League semi-final first-leg game on Tuesday. (Reporting by Iain Rogers, editing by Ed Osmond)