Shocking footage of the fight between smartly dressed men was shared online, showing the moment one man is attacked with what appears to be a champagne or wine bottle.
Stewards in high-vis jackets can be seen desperately trying to stop the fracas but are continuously overpowered by the men, who continued to pummel one another.
It is not clear what caused the scuffle, which happened on a balcony at the Lord Daresbury Stand.
At one point a woman attempts put herself between the brawling men, however, another man can be spotted with a bottle in his hand before striking another around the head.
Arrests were made after a brawl at the Grand National meeting in Aintree
He is then kicked down the stairs, before walking out of the view of the camera. The unnamed man appears to walk away, while another involved in the fight ushers him back, seemingly to continue the fight.
The bottling victim can later be spotted covered in blood and with a huge gash at the back of his head.
Another man was also pictured with blood pouring from his face after the fight.
A 52-year-old man was arrested on suspicion of assault and remains in custody, in relation to the fight.
Merseyside Police have also confirmed six other arrests at the world famous event on Saturday, in Liverpool.
Two 27-year-old men were arrested for affray, a 37-year-old man on suspicion of theft, a 52-year-old on suspicion of voyeurism and a 43-year-old man for breach of the peace.
A 42-year-old man was also arrested on suspicion of assault and a 36-year-old man for being drunk and disorderly.
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More than 150,000 race-goers packed themselves into the famous Aintree course to watch One For Authur win the 170th edition of the Grand National.
Grand National runners 2017 Thu, April 6, 2017
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Merseyside police hailed the three-day event as a success, despite the presence of armed officers in the wake of the Westminster terror attack only weeks before.
Chief Superintendent Claire Richards said: “Grand National day always attracts big crowds and this was the event was no exception.
“During the course of the three days, the majority of those attending were able to safely enjoy a good-natured atmosphere and have a great time.
“Despite the high number of race-goers there has only been a handful of arrests on the course over the three days and I would like to take this opportunity to thank everyone, including those who worked during the festival, for helping to make this a safe and enjoyable occasion for everyone.”