It’s the topic on everyone’s lips at the moment: How do you beat Britain’s heatwave? And for Alexander Zverev next week, it’s even more pertinent.French Open champion Zverev, 29, has only made it as far as Round Four at SW19 in previous years but will look to make history by joining an elite club of six men to have won Roland Garros and Wimbledon in the same year.To do so, the German will have to cope with the increasingly extreme heat in London. His biggest obstacle to success at Wimbledon is undoubtedly champion Jannik Sinner – who wilted in Paris, feeling ‘dizzy’ and ‘weak’ in 30C heat, to open up the draw for a Zverev victory.The forecast for Wimbledon next week is not quite as hot as the current 34C heatwave in London but is already expected to peak at 26C in early estimates. Zverev is making special preparations.He has bespoke kit from adidas, their CLIMACOOL+ performance fabrics, designed to ‘enable airflow, keep the fabric away from the skin, and keep athletes cool and dry’ using 3D raised structures. Sabastian Sawe wore the same technology to run his historic sub-two-hour London Marathon in April. Alexander Zverev is pictured training at Wimbledon this week ahead of his title bid Zverev will wear adidas kit that features ‘3D raised structures’ to help in the Wimbledon heatQuizzed by Wimbledon’s official channels on whether he preferred ‘too hot or too cold’ this week Zverev said: ‘Too hot – even though I’m German’.The kit has been made especially for him after testing in adidas’ climate chamber and through the use of ‘thermal mannequin analysis’ and use of athletes in their field. Adidas say the raised elements of Zverev’s gear will ‘maximize airflow without trapping heat, helping reduce wet cling and discomfort’.The heat is an active issue for Wimbledon more generally. On Wednesday, play was suspended at qualifying after the tournament’s electronic line calling system failed amid extreme temperatures in Roehampton.The pre-tournament qualifying matches are held at the LTA’s National Tennis Centre, where the mercury rose to a stultifying 33 degrees Celsius, with 51 per cent humidity.Players – including British stars such as Dan Evans and Oliver Tarvet – were called off the courts just after 12.15pm, with matches resuming at 1.30pm after getting the line calling system up and running again.’We’ve had a very challenging day, as you know, it’s swelteringly hot here, the temperatures are due to rise to about 37 degrees, so there have been a few power issues which has affected the electronic line calling system across the court,’ Annabel Croft confirmed on BBC commentary. ‘But the good news is that they’ve fixed it, and play is due to resume.’ The 3D structures are placed directly to the areas where tennis players sweat most The same technology was used by Sebastian Sawe during his historic sub-two-hour marathonA statement from the All England Club (AELTC), Wimbledon’s organisers confirmed: ‘There was a temporary loss of power to part of our Qualifying venue, which meant that the electronic line calling system could not function. Power has now been restored and play is expected to resume shortly.’Daily Mail Sport understands that Wimbledon will continue to investigate the issue that caused the outage, with extreme heat thought to be a possible factor.The other top-three favourite for the men’s title, Novak Djokovic, pulled out of a Wimbledon warm-up event as temperatures rose in West London.Djokovic’s preparations have been stalled by the searing heat as he withdrew from the Giorgio Armani Classic at Hurlingham in Parsons Green.The 39-year-old was scheduled to play an exhibition match against Karen Khachanov in what would have been his only pre-Wimbledon match on a grass court.Djokovic and the event organisers gave no official reason for pulling out but the heatwave is suspected to have influenced his decision.