Conor McGregor and Jose Aldo were due to face off this weekend in Las Vegas, but with the Brazilian pulling out through injury, Chad Mendes has stepped into the breach. 

Mendes presents a very different challenge for McGregor than what Aldo would have, and while many of the fights that the Irishman has been involved in to date have seen him win with ease, there's little doubt that Mendes is a different kettle of fish altogether. 

He has the same record as McGregor, and even though he is significantly shorter than the Dubliner, his background as an All-American wrestler is one that could cause problems when it comes to takedowns. However, as the man himself says, it is a whole different ball game when Conor lands a strike on his opponent, and with an 8-inch reach advantage, Mendes will have plenty of problems of his own to contend with. The fact that both fighters have been given this bout on short notice should add to the intrigue, so if you can stay up late on Saturday to watch it on BT Sport 2, then it should be worth your while. Just make sure to have a good source of caffeine on hand, as the main card starts at 1am, and the event is expected to run until about 6am.

If tennis is more your thing, than what is probably the biggest tennis tournament of the year finishes up this weekend with both the men's and women's finals taking place. Serena Williams cruised past Maria Sharapova to claim her place in Saturday's final, and is the strong favourite against Garbine Muguruza. The 21-year-old Spanish-Venezuelan tennis player hasn't made much of an impact in her previous trips to SW19, but she remains confident that she can beat Williams even though she's unfamiliar with the pressure of being on the biggest stage. Coverage starts on BBC One at 1.00pm.

Nocak Djokovic is through to the men's final, where he will meet either Roger Federer or Andy Murray, who are battling it out as we speak to face the Serbian. Federer has been in his usual superlative form to date, dazzling the crowds with his spectacular shots, while Andy Murray will once again have a huge crowd behind him, rooting for the homegrown favourite. Whoever comes out on top will have the unenviable task of trying to wrestle the trophy from the hands of Djokovic, who is the reigning champion, so expect a hard-fought epic that you can't take your eyes off. Coverage starts at 1.50pm on BBC One. 

Dublin take on Westmeath in the Leinster final this Sunday too, which will be live on The Sunday Game on RTE 2 at 1.15pm. After an incredible comeback and an unlikely win over Meath in the semi, Westmeath have already created a bit of history for themselves, but a Dublin side firing on all cylinders is a force to be reckoned with. No one is giving Westmeath much of a chance in this final, but the pundits didn't have them as favourites in the last round either. They couldn't do it again, could they?