Handball fans have been treated to some famous rivalries through the years but the present face-off between Limerick's Martina McMahon and Cork's Catriona Casey may just be the most gripping of all.

The pair have met in five finals in the last 12 months, with McMahon winning the four most important games - the All-Ireland 40x20 and 60x30 Senior Single, the Irish Open and the World Championships last August.

On Saturday McMahon will take on former winner Aisling Reilly of Antrim in the O'Neill's All-Ireland 40x20 semi-final with Casey meeting Roscommon's Fiona Tully. Both are fancied to prevail and set up another showdown in the decider.

But while McMahon now holds all of the major titles in the game at home and internationally, she is not resting on her laurels. 

"I suppose on paper I am number in the world but to me I still have a lot of work to do," said the Broadford left-hander.

"I know there are going to be players chasing my tail but I am just aiming to work on my own game and stay focused on what I want to do for myself and my own goals.

"To put it bluntly, I am not bothered, you could say, with the ones coming chasing me. I'm just focused on myself and what I want to do and hopefully it all goes to plan."

McMahon's explosive attacking style has caught the imagination of the handball public in recent seasons and she sees no reason to change her approach.

"I have a one-track mind, if there's a kill-shot on, that's what I am going for," she said.

McMahon, though, insists that her thoughts are not dominated by her Cork rival.

"No, I wouldn't be focusing on that. There is a lot of hype around the place about it and there are a lot of people that want insights into my thinking about it and it's probably the same Catriona. 

"You could get caught up in all of that but that's not for me, I just focus on what I want to do, just focus on myself and not get into any mind games like that."

Meanwhile, the race for the O'Neill's All-Ireland Men's Senior Singles title is also down to the final four.

Number one seed Diarmaid Nash of Clare will meet Kilkenny's Patrick Funchion while defending champion Martin Mulkerrins of Galway takes on three-time winner Robbie McCarthy from Westmeath.

Nash will be slight favourite to advance to his first Senior Singles final since 2014 while the other tie could not be more finely poised, with McCarthy's excellent recent form - he won the Irish Open tournament last month - possibly tilting the balance the way of the Mullingar maestro.