Portugal took the lead through an own goal just before half time
Reigning European champions Portugal made a winning start to their World Cup qualifying campaign as they edged a stubborn Azerbaijan.
Maksim Medvedev's unfortunate own goal proved the difference when a punched clearance by goalkeeper Shahrudin Mahammadaliyev hit the defender and deflected into his own net.
Cristiano Ronaldo failed to score on a frustrating night for him.
The Juventus forward went closest when his overhead kick went over the bar.
He also saw a free-kick deflected wide and a strong shot kept out by Mahammadaliyev as he looked to add to his international tally.
Ronaldo is seven behind all-time leading international scorer Ali Daei, who has 109 goals.
Manchester United's Bruno Fernandes and Atletico Madrid's Joao Felix were also denied by the excellent Mahammadaliyev.
Line-upsMatch StatsLive Text
12Lopes20Cancelo3Coutinho Meneses Duarte4Rúben Dias5Tavares Mendes10Bernardo Silva8João Moutinho18Neves19Neto9André Silva7Cristiano Ronaldo12Lopes20Cancelo3Coutinho Meneses Duarte4Rúben Dias5Tavares Mendes10Bernardo SilvaSubstituted forOliveiraat 88'minutes8João MoutinhoSubstituted forBruno Fernandesat 45'minutesBooked at 81mins18NevesSubstituted forAlves Palhinha Gonçalvesat 88'minutes19NetoSubstituted forFerreira Silvaat 63'minutes9André SilvaSubstituted forSequeiraat 75'minutes7Cristiano Ronaldo
1Malheiro de Sá2Novo Neto6José Fonte11Bruno Fernandes13Alves Palhinha Gonçalves14Oliveira15Ferreira Silva16Renato Sanches17Jota21Cédric Soares22Dantas da Silva23Sequeira
12Mahammadaliyev5Medvedev15Huseynov14Badalov18Krivotsyuk13Huseynov8Mahmudov6Mustafayev3Salahli10Emreli9Ghorbani12Mahammadaliyev5Medvedev15Huseynov14Badalov18Krivotsyuk13HuseynovSubstituted forNurievat 45'minutes8MahmudovSubstituted forIsaevat 85'minutes6MustafayevSubstituted forIbrahimliat 45'minutes3Salahli10EmreliBooked at 52minsSubstituted forAlasgarovat 85'minutes9GhorbaniSubstituted forSeydaevat 85'minutes
Home TeamPortugalAway TeamAzerbaijanPossessionHome67%Away33%ShotsHome29Away4Shots on TargetHome14Away0CornersHome10Away0FoulsHome9Away11
Match ends, Portugal 1, Azerbaijan 0.