Refs less biased with no crowd
Apogolies if posted elsewhere. Hearing of research into the Bundesliga being played behind closed doors which has shown a reduction in home advantage. But not because of the influence of the crowd, or lack of it, on the teams. More to do with the lack of influence of the crowd on the referees whose decisions have been more evenly balanced between the home and away teams.
So once spectators are allowed back the message is clear. Get tore right into the ref straight from KO.