In the women's doubles, Xu Yifan from China and America's Nicole Melichar reached the second round after edging past their opponents in straight sets. Enditem
In contrast to Real Madrid, FC Barcelona have had a nightmare summer when all the problems came home to roost at the same time after their 8-2 thrashing to Bayern Munich highlighted their failure to renovate the squad adequately over recent years.
"He's a very solid player, maybe doesn't possess any big weapons, but every shot is very good," Djokovic said of Busta. "He returns a lot of balls, so I've got to be ready for a lot of exchanges. It's going to be a demanding match physically and mentally. Hopefully I'll be able to continue the good performance that I had tonight."
Zaniolo picked up an injury after a challenge with Donny van de Beek in the UEFA Nations League fixture between Italy and the Netherlands, and the result may cast a shadow on the star's future.
Haris Hajradinovic put Bosnia ahead in the 24th minute with a penalty before Kamil Glik's powerful header leveled the score for the visitors just before the break. Kamil Grosicki's header in the 67th minute sealed Poland's win. Enditem
Despite dominating possession, Albania could not find an equalizing goal and suffered a further blow when captain Elseid Hysaj was sent off after receiving a second yellow card late in the match.
On paper, the Real Madrid squad doesn't look much stronger ahead of the new campaign than it did at the end of the last one, and any major arrivals appear unlikely. However, the summer chaos at FC Barcelona and the fact that Atletico Madrid haven't made any signings either implies that merely by standing still, Real could open up a gap.
Some of the country's top athletes serving sanctions for the doping offices includes 2008 Beijing Olympics 1,500m champion Asbel Kiprop, 2016 Rio Olympics women's marathon champion Jemimah Sumgong, and former three-time Boston Marathon champion Rita Jeptoo, among others.
"We do not want to speculate on any situation," he said. "Considering the possibility of (further) postponement or cancellation, in case of any discussion, the IOC, Tokyo 2020 and key partners will have to sit together for any possible options at that time."
Both World Cups and the Finals will be staged in China with support from the Chinese Table Tennis Association (CTTA), meaning that the Women's and Men's World Cups will no longer take place in Bangkok, Thailand, and Dusseldorf, Germany as originally planned.
Sweden's star pole vaulter Armand Duplantis once again failed to beat Ukrainian legend Sergei Bubka's 26-year-old best outdoor mark of 6.14 meters, as the 20-year-old failed all his three attempts at 6.15m after clearing 6.00m. Enditem