The Tigers' man mountain warmed up for the quick-fire rematch with two tries for the former double Heineken Cup champions in their 36-8 Premiership victory over Northampton Saints at the weekend while Toulon were doing a similar demolition Top 14 job on Stade Francais Paris.
"This is going to be a massive game and it is very important for us to keep this momentum going," said Tuilagi.
"It was a good win at Northampton but we have to keep working hard and turn it up a bit more against Toulon."
And while the midfield contest between Tuilagi and Bastareaud promises to be a highlight, the Martin Castrogiovanni "will he, wont he" saga provides an absorbing side show in the build-up to the main event.
The Italian international tight head prop is poised to play his 63rd tournament match when the former double champions go to the South of France and ironically that will be against the club he has been linked with.
Leicester Tigers chief executive Simon Cohen insists Castrogiovanni's move to Toulon could still go ahead but Toulon president .Mourad Boudjellal insists the deal is off.
Boudjellal claimed excessive financial demands had ruined the proposed three-year deal, despite the 31-year-old tight-head having agreed terms with the Top 14 giants.
"Martin Castrogiovanni is not within our means," he said. "The case is closed and Castrogiovanni will not play in Toulon."
However Cohen confirmed that as far as Leicester were concerned Castrogiovanni could still be playing in Toulon next season if the initial fee was met.