The 2015 champions, Portugal, were made to sweat, though, as both sides exchanged goals in the first period through Coimbra’s penalty in the fifth minute, before Oman's Jalal Al Sinani equalised with a free header four minutes later.

Be Martins scored the only goal of the second period and it was a beauty. The diminutive and skilful player hit a blistering shot into the top corner from distance, with Oman’s Younis Al Owaisi left helpless in the 21st minute.

UAE needed a win to advance to the knockout stage but Senegal scored three times in the final period to seal a quarter-final meeting with Portugal.

Japan were confident from the start, having secured a top two finish in Group A, after beating Paraguay and USA in their earlier matches.

Having lost 8-2 to reigning champions Brazil on Friday, Oman needed to win against Nigeria and did it in thrilling fashion.

They face Portugal on Tuesday where another three points will take them to the knockout stage.

The result revived UAE's hopes after they had fallen to a 5-1 defeat to Belarus in their opening match.

The West Asians play Senegal, who defeated Belarus 7-2 on Sunday, in their final group stage tie on Tuesday needing a win to advance.

It was Japan's second successive win and sealed their place in the knockout stage, with the Asian champions having defeated Paraguay 5-4 in their opener on Thursday.

Japan will play Switzerland, who edged Paraguay 7-6 in extra-time, on Monday with the East Asian side only needing a draw to win the group.

Mauricinho made his 100th appearance for Brazil in style by scoring a hat-trick while Oman had their moments to savour as well in the Group D tie at the Los Pynandi Stadium in Asuncion.