Weekend in sport: FA Cup throws up surprises; NFL playoffs kick off; Champion Socceroos slump to shock defeat in Asian Cup

Oldham Athletic keeper Daniel Ivarsen celebrates saving a penalty from Fulahms' Aleksandar Mitrovic during their FA Cup Third Round match at Craven Cottage.

(CNN)Lower league sides indulge in some FA Cup giant killing... NFL postseason opens with wildcard weekend... Socceroo shock in the UAE... Warriors and Kings put on three-point show... Swiss duo tighten grip on Hopman Cup ahead of Australian Open. This is your weekend sporting roundup.

Romance isn't dead in the FA Cup

Barnet's David Tutonda leads the celebrations following his side's 1-0 victory over Sheffield United.
The "romance of the cup" is a well-worn FA Cup cliche, but fans of Barnet, Oldham Athletic and Newport County are feeling the love as the three lower-league sides overcame fancied opposition -- Sheffield United, Fulham and Leicester respectively -- to advance to the fourth round of the football's oldest cup competition.
Barnet -- currently languishing in 15th place in the National League, the fifth tier of English football -- provided arguably the shock of the day by beating Championship side United 1-0, courtesy of a Shaq Coulthirst penalty early in the first half.
    For Oldham's caretaker manager, Pete Wild, it was a day to savor as his unfancied side rose to the occasion to put away Premier League Fulham 2-1, with the London side currently 59 places above the Latics in the league structure.
    Oldham manager Pete Wild celebrates with player Sam Surridge following Athletic's FA Cup thrid round victory.
    "It means a lot to me and my family. We're all Oldham people," he said after securing the win. "We're from a small town overshadowed by big neighbors and I'm so proud to give something back."
    Newport manager Michael Flynn was equally ecstatic with his side's 2-1 win over the Foxes. "It's almost 'Roy of the Rovers' stuff, I can't believe it," he said, referencing the classic football comic. "It's the first time I've beaten a Premier League club as a manager so it's one I'll never forget. I'll have a few drinks with the wife tonight."