A key event in the clay court season in the build-up to the French Open, the Madrid Masters will run from 27 April to 9 May.
Maharashtra government has not allowed resumption of competitions in the state due to the pandemic and has put in place a strict mandatory 14-day quarantine period for all visitors, a conditions which ATP does not want to fulfil as of now.
With the 2021 tennis schedule facing inevitable issues with the Covid-19 pandemic, three-time Grand Slam winner Murray hopes the long-awaited vaccine will be available by the spring and that a compulsory programme is rolled out within tennis.
In a message to players the ATP, the men's tennis tour, said arrivals originally planned for December were now uncertain, potentially disrupting the packed January schedule.
Djokovic said the biggest concern was the unpredictability of the 2021 calendar, with decisions taken out of the hands of the sport's administrators as a result of Covid-19.
Paris Masters 2020: Alexander Zverev says he's 'still smiling' despite losing final, assault allegations
Zverev led by a set against Medvedev in his bid for a fourth Masters title on Sunday, but fell to a 5-7, 6-4, 6-1 defeat.
Djokovic, a winner of 17 Grand Slam titles, had already moved past Sampras' tally of 286 weeks in the top spot in September.
Paris Masters 2020: Rohan Bopanna, Oliver Marach enter men's doubles quarter-finals with hard-fought win
The unseeded Indo-Austrian pair came from behind to defeat their fancied rivals 3-6 6-4 10-8 in the round of 16 tie Wednesday night.
The 31-year-old's career milestone came at his third appearance in an ATP final after Tokyo in 2019 and Budapest the season before.
Top-seeded Djokovic lost four straight games and had to save a set point before beating Filip Krajinovic 7-6 (6), 6-3 in an all-Serbian match, and No. 2 Thiem nearly squandered a 5-1 lead in his 6-4, 7-5 win over Vitaliy Sachko of Ukraine.
Felix Auger-Aliassime, Jeremy Chardy, John Millman and Andy Murray were voted on to the council by their fellow players.
Among the areas the PTPA would look into, according to the email: ATP and tournament rules and regulations, revenue sharing, disciplinary actions, pensions, travel, on-site food and amenities, insurance and medical care.
Tennis will be back in full swing as of Saturday, when main-draw action at the Western & Southern Open begins in Flushing Meadows - on the same hard courts that will be used for the US Open
The Western & Southern Open normally is held in Cincinnati but was moved to New York this year as part of an unusual doubleheader of sorts with the US Open because of the coronavirus pandemic.
USTA spokesman Chris Widmaier said his group and its representatives are in touch with the WTA, ATP, the French tennis federation and government officials in Italy and France about quarantine concerns.
Italian Open could be expanded to 96 players as tennis officials face race against time to rewrite schedule
The ATP Tour approached Rome organizers with an expansion proposal and offered to cover the extra prize money that would be required, Italian Tennis Federation president Angelo Binaghi said Wednesday.
Novak Djokovic, Coric, Grigor Dimitrov and Viktor Troicki all tested positive during the Adria Tour event in Serbia and Croatia, which was later cancelled.
Citi Open, scheduled to hold only the men's event in 2020, has now been cancelled owing to uncertainty caused by the coronavirus pandemic.
Coronavirus Outbreak: ATP Tour updates rankings procedure to cover 22 months ahead of return to play
ATP Tour's rankings have been frozen since 16 March, just days after the season was suspended. Play is set to resume in August ahead of the US Open.
'How selfish can you be?': Nick Kyrgios blasts Alexander Zverev for partying and self-isolation breach
Alexander Zverev had stated he would enter self-isolation of 14 days after the Adria Tour debacle but was seen partying in Monte Carlo.