Rory McIlroy is to be hit with a counter-claim when he takes legal action against his former sports agent.

McIlroy is seeking termination of his contract with Dublin-based Horizon Sports Management, and two other named companies Gurteen and Canovan Management.

It is understood the dispute is over fees charged by his ex-agent on endorsements, which includes landmark deals with Nike, Omega and Santander.

The 24-year-old's legal team applied to have the case heard in the Commercial Court in Dublin, a division of the High Court designed to fast-track business cases.

But a barrister for Horizon, set up by agent Conor Ridge, revealed a counter-claim will also be taken.

Mr Justice Peter Kelly ruled the golfer's claim, and the counter-claim, both exceeded the €1 million threshold to be heard in his court.

It is due to be listed for trial in October 2014 to fit in with McIlroy's extensive travelling worldwide.

The details of the case were not outlined in court, but McIlroy is reportedly unhappy with the amount paid to Horizon, said to be more than €7 million since he signed with them in September 2011.

The agency is fighting the action and maintains the contract was fair.