Some big rules may be introduced at Grand Slam level next year. As reported by Reuters, Wimbledon and Australian Open are thinking introducing the fifth-set tie-breaks in 2019, avoiding marathon matches like the one at this year's Wimbledon semifinals between Kevin Anderson and John Isner.

The South African prevailed 26-24 in the fifth set after six hours and 36 minutes. After that epic clash, the All England Club committee member had said that they were considering the chance to adopt a final set tie-break and now the option is more and more real.

At the moment US Open is the only Grand Slam featuring the fifth set tie-break, which was played during the amazing quarter-finals clash between the Spaniard Rafael Nadal and Dominic Thiem. Commenting recently on the topic, Kevin Anderson said: 'I think Wimbledon are looking at it.

There are obviously some pros and cons but I have heard that they are discussing it. It will be interesting to see what they come up with. And Australia, potentially, as well. A lot of sports are having to change their formats, there’s a different demographic coming up, so maybe even three-out-of-five-set tennis may have to be looked at, at some point.

So I wouldn’t be surprised if at some stage we do get to that (final set) tiebreaker.' Isner and Nicolas Mahut played the longest tennis match ever at 2010 Wimbledon, competing for more than 11 hours over three days.

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