LISBON, April 26 (Reuters) - Benfica edged closer to successfully retaining their Portuguese league title on Sunday after a cagey goalless draw in the top of the table clash with arch rivals Porto ended in an angry exchange between the coaches.
Tempers flared after the final whistle when Porto coach Julen Lopetegui crossed paths with his Benfica counterpart Jorge Jesus, who had to be pulled away by his staff after the pair began arguing.
With only four matches left in the 34-match campaign, the draw at Benfica's Estadio da Luz leaves the champions on 75 points, still three points clear of their old foes.