Having won the competition in 2005 and 2006, Andy Key's side again topped the Northern Conference after registering eight wins from 10 fixtures.
That set up a mouth-watering clash with Southern Conference champions Wasps, with the first leg taking place at Henley on April 16. Despite trailing 34-6 with less than 20 minutes remaining, Tigers showed immense character to cross for three unanswered tries, giving themselves a great chance of completing their A League hat-trick on Monday night.
The game kicks-off at 7pm, with season ticket holders and members having already received vouchers entitling them to free entry. Admission for other supporters is £5 for adults and £1 for children.
"It's a massive game and we're all really looking forward to it," said Tigers' head of rugby development Andy Key. "Once again, we're hoping for a huge crowd that will look to get behind us. They've been outstanding all season and I'd like to thank them for that. The support we've had at Welford Road this year has been fantastic and our aim as a side is not to let our members or ourselves down."