Porto grabs last-gasp equaliser

The two-time defending Portuguese champion took a 33rd-minute lead through Miguel Lopes but Rio Ave hit back late on and a double from Ricardo Tarantini (79 and 86) meant a shock upset looked on the cards.

However, just as it seemed it would suffer a first league defeat since January, Porto snatched a 90th-minute equaliser through Colombia international Martinez.

The result leaves Porto in second spot, level on 11 points with leader Benfica.

In the day's other match, the 60th-minute dismissal of Goncalo Santos proved costly for Estoril as it surrendered a two-goal lead to draw 2-2 at Sporting.

Fourth-placed Estoril went ahead on the stroke of half-time through Steven Vitoria's penalty and then doubled the advantage in the 58th minute thanks to Luis Leal.

But it lost Santos to a red card just two minutes later and Sporting took full advantage to claim a point, making it 2-1 through a 76th-minute own goal from Anderson Luis and then levelling up the scores six minutes from time when Ricky van Wolfswinkel netted.