2020 Gibraltar Open
... that some snooker matches at the 2020 Gibraltar Open were played without a referee?
... that some <a href="./Snooker" id="mwBbw" rel="mw:WikiLink" title="Snooker">snooker</a> matches at the <b id="mwBb0"><a href="./2020_Gibraltar_Open" id="mwBb4" rel="mw:WikiLink" title="2020 Gibraltar Open">2020 Gibraltar Open</a></b> were played without a referee?