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.

Belarus dominated the Group C match at the Los Pynandi Stadium in Asuncion from the start, with Illia Savich creating history by becoming the first player from the East European nation to score in the FIFA Beach Soccer World Cup Finals.

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.

Both sides played a patient game and neither was able to break the stalemate in the first period.

That changed 48 seconds into the second period as Masanori Okuyama broke the deadlock in style, before Ozu Moreira doubled Asian champions Japan's lead in the 16th minute.