Arsenal were left frustrated on Wednesday night as they twice squandered a one-goal lead against Manchester United to draw 2-2.
Shkodran Mustafi's header and a Marcos Rojo own goal were cancelled out by strikes from Anthony Martial and Jesse Lingard at the Theatre of Dreams.
Both of United's goals could have been easily prevented, though.
For Martial's equaliser, the Frenchman won a cheap free-kick from Matteo Guendouzi and then fired home when Arsenal defenders failed to clear Ander Herrera's cross. Herrera was also offside.
As for Lingard's goal, Sead Kolasinac's pass-back to Bernd Leno wasn't strong enough and allowed the Englishman to poke under Arsenal's goalkeeper.
Arsenal had numerous chances to win the game - Pierre-Emerick Aubameyang was denied twice by David de Gea - but try as they might they couldn't find a winner.
Henrikh Mkhitaryan and Alexandre Lacazette both found the back of the net late on, too, but Mkhitaryan was deemed offside and Lacazette illegally headed the ball out of De Gea's hands.
Alex Iwobi described Arsenal players' frustration after the game by saying, per Sky Sports: "We knew it was going to be a difficult game because Old Trafford is always a tough place to come.
"I guess it's a hard one to take because we were ahead twice. Both teams fought hard, though, so I guess a draw is a fair result for both teams."
Another moment of controversy during the game was Marouane Fellaini pulling on Guendouzi's hair in the 87th minute to stop the youngster from launching a late attack.
In the tweet below, you can see the Belgian literally yanking on Guendouzi's locks, which didn't even warrant a yellow card.
Arsenal fans want Fellaini to be banned for his naughty behaviour and now BBC Sport journalist Simon Stone has added fuel to the flames with a revealing tweet.
According to Stone, Leicester City's Robert Huth pulled on Fellaini's hair in 2016 and received a three-match ban for it.
Interesting. Fellaini could be in trouble with the FA and Premier League should his hair pull on Guendouzi be reviewed and if truth be told, he deserves it.
It's one thing to hack down an opponent for tactical reasons, but pulling on someone's hair is dangerous and at 31 years of age, Fellaini should really know better.