Tournament:SWT: Europe Ultimate Online Qualifier

SWT: Europe Ultimate Online Qualifier was the fifth Super Smash Bros. Ultimate qualifier for Phase One of the Smash World Tour 2021. It is region locked to several countries in Europe. The top twelve players of the main bracket and the top four players from the Last Chance Qualifier were invited to the Phase Two tournament.

Regions
The following countries were initially included, but were later removed in version 1.1 of the Official Rulebook on February 21st, 2021 (the day after the circuit's announcement) due to being "added by mistake in version 1.0".
 * 🇦🇲 Armenia Armenia
 * 🇨🇾 Cyprus Cyprus
 * Georgia Georgia
 * 🇰🇿 Kazakhstan Kazakhstan
 * 🇹🇷 Turkey Turkey

Super Smash Bros. Ultimate singles
(1,802 entrants) Phase 3 (Top 32) Finals (Top 12) * DQ'd from Losers.

Super Smash Bros. Ultimate Last Chance Qualifier
(1,790 entrants) Phase 4 (Top 28) Finals (Top 8)

* DQ'd from Losers.

Controversies
A TO's decision to resolve a set between and  via rock-paper-scissors, as the players were unable to connect with each other, was criticized and mocked. Youssef noted that AirLi had trouble connecting with other German players in the past and suggested checking the NAT Type of each player, which was dismissed. In response, noted that due to the situation, there was nothing else they could do as checking the NAT type wouldn't have resolved the issue.

Following his match against, it was revealed that played through the entire tournament without LAN. When confronted, Neibaf falsely accused that Freetox_ didn't play using LAN as well, which Cagt debunked. As a result, Neibaf was disqualified from the tournament, with Cagt noting that there would be more discussion on his actions after the event.