A morning storm involving lightning resulted in the first matches of today to be delayed for an hour before continuous heavy rain sparked concerns regarding the playing surface.

This caused the second round of fixtures to be postponed for initially an hour and then another two so that the fields could be drained.

The scheduled fourth and fifth rounds of today’s play have been pushed back until tomorrow, where they will be played if it is possible.

Despite the adverse conditions, the US' NOISE continued their march to the mixed team division title after comfortably defeating Singapore's Otters 15-7 in the first round tie at the Lebanon Sports Complex in Cincinnati.

Jack Kelly and Victor Luo were the standout players for the American side, with each player tallying a combined four goals and assists.

They are set to play Japan's IKU! following their similarly convincing 15-6 triumph over SUFC Valhalla.

The Swedish side had no answer for Reina Ishizu, who bagged three goals and became a provider on three other occasions.

GRUT also experienced an untroubled first playoff match with the Dutch team overcoming Denmark's Njord 15-7.

They are due to meet Germany's Disconnection following their 14-12 win against Voltaje.

A couple of matches were played in the second playoff round of the mixed division, which included Dominican Republic's Meclao' being unable to repeat their pool heroics.

They lost 15-13 to Britain's Reading Ultimate, who are now scheduled to face Finland's Pussin Tiristäjät in the quarter-finals.

The Finns snuck past Canada's LAB, who earlier skimmed past Japan's CRAZY with a 13-12 win, by beating their opponents 11-10.

Results in the open first playoff round saw mixed results for Japan as Buzz Bullets bettered Canada's Mephisto 15-10 but Nomadic Tribe fell to a 15-7 defeat to the US' PoNY.

Buzz Bullets and PoNY are now due to play each other in the quarter-finals tomorrow.

In the men's open crossovers, Rhino Slam! of the US secured a first round showdown versus title contender Clapham Ultimate of Britain.

Playing under clear blue skies, the Americans fended off Alba, who are also from Britain, 15-11 to have a shot of toppling one of the favourites.

Canada's Furious George blew out South Africa's Mutiny 15-6 to set up a first round showdown against Australia's Sunder.

Tchac of France have been drawn against Italy's CUSB Open after edging Germany's Wall City 13-11.

In the women's division, Australia's Ellipsis was one of the teams to progress to the quarter-finals.

They got the better of Canadian opponents Iris 15-6 and Ellipsis are now scheduled to play compatriots 6ixers.

6ixers advanced following their 13-9 victory over Traffic in an all-Canadian tie.

The women's crossovers action involved Germany's jinX overcoming the challenge of America's Chicago Nemesis 15-13 to set a date against another host nation opponent, Raleigh Phoenix, in the first playoff round.

America's Seattle Riot are due to face Japanese side Swampybarg after they previously bested HUCK, who are also from the country, with a 14-11 win.

Japan are also planned to be represented in the first round by MUD thanks to their comfortable 15-7 victory against Singapore's Pangolins.

MUD are set to take on the US' Boston Brutesquad.

The eventful day concluded with the exhibition Colour of Ultimate fixture between Shakers and Movers, which celebrates all people of colours, genders, immigration statuses, sexualities, and races.

Shakers turned out victorious, beating their opposition 13-9.

Devin Cox, an ultimate player and Colour of Ultimate organiser, told insidethegames that this was the "most anticipated" edition of the event prior to it taking place due to it being on the "highest stage in the world".

Rica Garcia, who participated in the match for the Shakers, added that these matches aim to be "empowering and inspiring" for people of colour.