India, March 10 -- This season's FA Cup just keeps on delivering shocks.

Third-tier Port Vale pulled off a massive upset on Sunday by beating Premier League Sunderland 1-0 to advance to the quarterfinals of the historic competition. That was after Championship side Southampton knocked out another top-flight team with a 1-0 win against Fulham.

Port Vale is bottom of League One and 57 places below Sunderland. But the West Midlands team booked its place alongside giants Liverpool, Arsenal, Manchester City and Chelsea in the last eight courtesy of Ben Waine's looping first-half header.

It was the latest giant-killing in a season that already saw sixth-tier Macclesfield eliminate titleholder Crystal Palace in what was officially the biggest...