Novak Djokovic will begin the defence of his 2018 Wimbledon title on Centre Court as this year's tournament gets under way.

Fresher temperatures and sunny spells are expected as the Serbian's bid for a fifth championships kicks off against German Philipp Kohlschreiber at 1pm.

After scorching temperatures of up to 34C on Saturday, the hottest day of the year so far, there will be cooler conditions for the first day of play at the All England Club, the Met Office said.

Meteorologist Marco Petagna told PA: "Tomorrow is a dry day with some cloud bubbling up through the day - so fairly sunny first thing and turning hazier with sunny spells.

"There will be a much fresher feel... with a high of 22C - which is about where it should be for the time of year."

Mr Petagna said temperatures "will warm up a little bit through the week" - up to around 25C - with sunny spells and some cloud each day, and "fairly clear skies" by Thursday.

"Pretty good for playing I would have thought - gentle winds," he added.

But, he warned that pollen counts would be "generally very high for the next few days", and that meant UV levels would also be high.

"People certainly need sun cream, plenty of water, hats and sunglasses," he added.

But if rain does threaten to fall this year as the tournament progresses, the new retractable roof over No. 1 Court could be called into action.

Unveiled in May, it joins the All England Club's other movable roof over Centre Court.

Other changes at this year's championships include a bid to improve its green credentials through the introduction of 100% recyclable water bottles, more recycling bins and on the ground "eco champions".