Thomas Stewart was one of the Northern Ireland scorers

Kyle Lafferty, Tommy Stewart and James Bell were the scorers for Roy Millar's men while Johnny Tuffey made a number of important saves at the other end.

In the other Elite match Brazil drew 1-1 with the USA at Ballymena.

In the Junior Section, Co Tyrone caused a major upset by beating Paraguay 1-0, with Dermot McGuckin scoring the goal.

Co Antrim and Co Armagh both overcame top opposition in the Premier section.

Co Antrim beat Scottish club Hearts 3-1 while Armagh claimed the scalp of Newcastle United with a 1-0 win.

Chelsea beat Co Tyrone 2-0 while Manchester United triumphed 5-0 over Co Londonderry.

Monday results
Elite Section
N Ireland 3-1 Serbia and Montenegro
USA 1-1 Brazil

Premier Section Results
Hearts 1-3 Co Antrim, Jomo Cosmos 1-2 Cherry Orchard, CSKA Moscow 1-3 Cruz Azul, Feyenoord 2-0 Shamrock Rovers, Sheffield Utd 0-0 Co Down, Benfica 0-2 Livingston, BK Callies 2-3 Co Fermanagh, FC Barcelona 1-0 Botofogo, Chelsea 2-0 Co Tyrone, Man Utd 5-0 Co Londonderry, FC Porto 3-0 Otago, Newcastle Utd 0-1 Co Armagh

Junior Section
Everton 2-0 Co Down, CSKA Moscow 1-0 Co Armagh, Shamrock Rovers 0-0 Hibernian, Lyngby 2-0 Cherry Orchard, Crewe Alex 3-0 Co Londonderry, Paraguay 0-1 Co Tyrone, Ipswich 1-0 Dundalk SL, Home Farm 1-3 Hearts, Red Star Belgrade 3-0 Co Fermanagh, AIK Stockholm 2-0 Queen of the South, Swindon Town 0-0 Co Antrim, Maccabi Haifa 0-1 Shelbourne.