But first Leinster would have to get past Ulster on Friday night (kick off 7.05pm) and the Ospreys would then need to topple Munster at Thomond Park 24 hours later.
Friday's third clash of the season with the boys from Belfast is the first of what Leinster hope will be three huge knockout games in as many weeks.
Joe Schmidt's men face Northampton Saints in the European Cup Final a week on Saturday and could then be celebrating Magners League glory seven days later.
Tickets for the first installment of that potential hat-trick of fixtures are selling well but you can still secure your place at what the Dubliners are intent on ensuring will be another packed house in the capital.
Tickets start at €30 for adults and €10 for children while family tickets are also available for only €70 for a family of four.
Tickets are now on sale online or you can also walk in and buy them from any Ticketmaster outlet, Spar or the Leinster Rugby Store in Donnybrook and Champion Sports in Grafton Street.
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