ROME, Aug. 19 -- Italy's Serie A championship officially kicked off at the weekend, with AS Roma beating Torino 1-0 in a hotly contested match that saw Bosnian forward Edin Dzeko score the winning goal in the 89th minute.

A goal by Torino forward Iago Falque was annulled on a technicality, while defenders Lorenzo De Silvestri and Armando Izzo both sustained injuries and had to be substituted.

The match marked the debut of Nigerian right back Ola Aina, whose transfer to Torino on loan from Chelsea FC was made official on Aug. 17.

AC Milan-Genoa and Sampdoria-Fiorentina, which were set to be played Sunday, have been postponed at the request of the two Genoa-based teams in the wake of Tuesday's deadly bridge collapse in their home town.

The weekend's championship matches, a total of seven, were preceded by a minute of silence in memory of the 43 victims.

On Saturday, reigning national champions Juventus beat Chievo 3-2 and Napoli beat Lazio 2-1.

Saturday also marked the much-anticipated debut in Italian football of star striker Cristiano Ronaldo, who failed to score.

Ronaldo joined Juve in July after nine years at reigning UEFA champions Real Madrid, during which he became their leading scorer of all time.

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