Tottenham Hotspur were denied a victory on Sunday after Newcastle United were awarded a penalty in stoppage time for handball by Eric Dier, who was facing in the opposite direction to the ball when he jumped.
Manchester United defender Victor Lindelof was also on the receiving end of a harsh penalty decision during their 3-1 defeat by Crystal Palace in their season-opener.
“I think football has changed,” Solskjaer said. “There are no fans, it’s a different game. Pre-season we were at different stages, the new handball rule… you never know what’s going to happen.
“We need to get that clarity. It’s a whole spectrum of things that aren’t normal. There have been so many changes and nuances to different rules,” Solskjaer added.