Emma Raducanu is through to round two of her home Grand Slam ©Getty Images

Reigning US Open champion Emma Raducanu and two-time Wimbledon champion Sir Andy Murray are both through to the second round at the grass-court Grand Slam, which began today without banned Russian players in attendance and lacking its usual ranking points.

Murray, Wimbledon champion in 2013 and 2016 as well as winning an Olympic gold medal at the same venue during London 2012, came back from a set down to beat Australia's James Duckworth 4-6, 6-3, 6-2, 6-4.

The Briton has never lost in the first round of the home Grand Slam and has set up a second-round meeting with American John Isner.

Isner, seeded 20th, needed five sets to get past French qualifier Enzo Couacaud.

Pole Hubert Hurkacz was also taken to five sets - but lost - in perhaps the biggest shock of the opening day.

Hurkacz reached the semi-finals last year but succumbed to a 7-6, 6-4, 5-7, 2-6, 7-6 defeat against Spaniard Alejandro Davidovich Fokina, losing Wimbledon's first 10-point final-set tiebreak.

Defending champion Novak Djokovic avoid a similar fate against Kwon Soon-woo.

The South Korean won the second set to spark hopes there could be an upset on the cards, but Djokovic won 6-3, 3-6, 6-3, 6-4.

This could be Djokovic's last Grand Slam for 11 months as the Serbian is not vaccinated against COVID-19, so cannot enter the United States at present.

Having been deported from Australia earlier this year over his vaccination status and visa application, Djokovic is set to miss next year's Australian Open as well as the 2022 US Open.

Ninth seed Cameron Norrie joins Murray as a Briton through to the men's singles second round, following a 6-0, 6-7, 6-3 win versus the Spaniard Pablo Andújar.

Norway's Casper Ruud and Spanish teenager Carlos Alcaraz - both top-five seeds - also advanced.

Second seed Anett Kontaveit had five breaks of serve in beating American Bernarda Pera ©Getty Images
Second seed Anett Kontaveit had five breaks of serve in beating American Bernarda Pera ©Getty Images

In the women's singles, 10th seed Raducanu saw off Alison Van Uytvanck from Belgium 6-4, 6-4.

Tunisia's Ons Jabeur and the Estonian Anett Kontaveit - the third and second seeds - advanced in straight sets.

So too did Germany's Angelique Kerber, the 2018 champion.

Czech Marie Bouzková recorded the biggest shock of the day in the women's singles, beating American Danielle Collins 5-7, 6-4, 6-4.

Collins was seeded seventh, despite having been past the first round at Wimbledon only once.

Players from Russia and Belarus are banned from Wimbledon this year because of the war in Ukraine.

Russia launched a full-scale invasion on February 24, with Belarusian support, and since then at least 4,731 civilians have been killed in Ukraine, according to the United Nations (UN).

The UN fears the true figure is far higher and it does not include fatalities from a Russian missile strike on a busy shopping centre in Kremenchuk today.

More than 7.5 million refugees have fled Ukraine.

Russia and Belarus have largely been frozen out of international sport because of the war, but tennis players from the nations have been able to play on the Association of Tennis Professionals (ATP) and Women's Tennis Association (WTA) Tours sans national flags.

The decision to ban Russian and Belarusian players outright from Wimbledon led to the ATP, WTA and International Tennis Federation stripping the tournament of its ranking points.