The Vikings can take a huge step towards guaranteeing their Super League status with a win over the visiting Broncos this weekend.
Betts is in confident mood as he feels his Widnes side is vastly superior to their Championship opponents' squad.
However, the Widnes coach believes the pressure is on his players and has urged them to keep their emotions in check.
"What we have to do this week is recognise where we are, shake off that little bit of anxiety and recognise that there isn’t one player in their team that would make our team," he said, as reported by Total Rugby League.
"And be a little bit confident that we’re at home have the ability to win this game and win this game well and go out and prove that."
He added: “They’re [London] playing in a fearless manner and it gives them an opportunity to put you under pressure.
"It’s about controlling the anxiety which has always been the problem for a Super League team."