Warrington Wolves' winning run continued in dramatic fashion at Castleford Tigers, while Hull FC edged out Wakefield Trinity.
Two Wakefield Trinity players returned positive coronavirus tests, forcing the game with Leeds Rhinos to be called off.
Hull FC had 12 cases of coronavirus at the club in mid-August, but they returned to action with a handsome win on Sunday.
Catalans Dragons crushed Wakefield Trinity but Warrington Wolves were made to work hard against Huddersfield Giants.
St Helens showed just why they are defending Super League champions with an outstanding win at Leeds Rhinos, led by Regan Grace.
There was no date specified over a potential Super League return following a meeting between clubs and RFL officials.
Hull FC held off an incredible comeback from Wakefield Trinity, but Marc Sneyd only secured the win in golden-point extra time.
Israel Folau made his Super League bow in England on Sunday, helping Catalans Dragons record a dramatic win at Hull FC.
Castleford Tigers beat Wakefield Trinity for a 14th straight time, as Huddersfield Giants and Warrington Wolves also claimed wins.
St Helens are top of the Super League table with three games played after they beat Hull FC 32-18, while Wakefield Trinity beat Warrington.