United were left fuming after the Gunners scored, despite David de Gea having been taken out by one of his own teammates.
With the vast majority of Australians bored to sobs with the Federal election, five sporting events around the world have delivered in the most scintillating, spine-tingling way.
We kick off with the Liverpool-Barcelona Champions League semi at Anfield.
The home side created history by becoming the first team to qualify for the final after being down 3-0 from the first leg.
Their 4-0 victory was against all odds, with Divock Origi netting the seventh and 79th minutes, book-ending Georginio Wijnaldum’s goals in the 54th and 56th.
The Reds will meet Tottenham in the decider, after Spurs turned in their own brand of survival magic at Johan Cruyff Arena to beat Ajax 3-2 and secure a place in the final on away goals.
It took Brazilian Lucas Moura netting in stoppage time to complete a timely hat-trick to do finish the job.
Then it was Perth Glory’s turn for glory in an A-League semi against Adelaide, at Optus Stadium.
Perth led 2-0 moving into the late stages of regulation time, but Adelaide were made of sterner stuff to score in the 81st and 90th minutes to move into extra time.
Again Perth led early, but blew it when United levelled at 3-3 for a penalty shootout.
In as tense a shootout as ever seen in Australian football, the Glory eventually won through 5-4, but not until five successive shots were saved.
But the IPL final at Hyderabad wasn’t going to be left out of the sporting thrillers, with the Mumbai Indians beating the more favoured Chennai Super Kings by one run – off the very last ball of the game.
Mumbai posted 8-149 off their 20 overs, with Kieron Pollard smacking successive fours off the last two deliveries, which turned out to be critical.
The 150 target looked well in sight when the ever-reliable MS Dhoni and Shane Watson were at the cease, the veteran Australian making the most of being dropped three times.
But both were run out taking ridiculous chances, and Mumbai crept home in a nail-biter.
And that left Kawhi Leonard to grab the fifth heart-stopper.
With 4.2 seconds left on the clock, the scoreboard locked at 90-90 and the series at 3-3, the Toronto Raptor shot from the corner.
While everyone in the packed stadium was hushed, the ball bounced off the rim not once, not twice, not three times, but four – until it went through for a 92-90 scoreline.
Toronto move forward in the Eastern Conference, ending the Philadelphia 76ers’ campaign.
From hushed silence to deafening celebrations, befitting the fifth of five sporting events to live in the memory.