BUENOS AIRES (Reuters) -River Plate were held 0-0 at home by San Lorenzo in the Argentine Clausura tournament on Sunday as Marcelo Gallardo's side remained unbeaten in the campaign and two points clear of their city rivals at the top of Group B.
The hosts controlled proceedings from the outset and thought they had taken the lead after 15 minutes but Enzo Perez's long-range effort was ruled out for offside.
River continued to dominate after the break but were frustrated by San Lorenzo's well-organised defence, with Giuliano Galoppo coming closest to a winner when his header was saved by goalkeeper Orlando Gill.
River next face San Martin de Tucuman in the Argentine Cup on Saturday.
(Reporting by Janina Nuno Rios in Mexico City; Editing by Peter Rutherford)
