"In fact, we're still waiting for legal guidelines to run the games," Dortmund's sports director Michael Zorc complained.
McDonald tried to play more aggressively in the third set, but it was too late and not enough to overturn a match against the greatest ever tennis player on clay.
Jaloliddin Masharipov (2nd L) of Pakhtakor react after receiving a red card from the Jordanian referee Adham Makhadmeh during the AFC Champions League quarter-final match between Pakhtakor of Uzbekistan and Persepolis FC of Iran at Jassim Bin Hamad Stadium in Doha, capital of Qatar, Sept. 30, 2020. Persepolis FC won 2-0. (Photo by Nikku/Xinhua)
Emerson scored an own goal in the 48th minute to make it 2-2 after goals from Aissa Mandi and William Carvalho had canceled out Fede Valverde's 14th minute opener for Real Madrid.
But overheated discussions about the future of the 55-year-old and the club's risky cost-saving policy might deliver some glimpses into the Bavarians agitated mood ahead of the German Supercup against Borussia Dortmund this Wednesday evening.
At Roland Garros, Djokovic has another record to achieve - becoming the first men's player in Open Era history to win each of the four Grand Slam titles at least twice.
In the Uruguayan capital Montevideo, Penarol kept alive their hopes of progressing to the next stage, with a 3-0 win over Chile's visiting Colo-Colo.
Local hero Daniil Kvyat gave the Russian fans in attendance something to cheer with eighth place ahead of AlphaTauri teammate Pierre Gasly, while a difficult race for Alex Albon saw the Red Bull driver finish tenth.
The 62-year-old didn't exclude himself from the solution after leaving RB Leipzig eight weeks ago.
"I am really happy about my first round. I was facing another great champion today. The transition to clay and the cold conditions worked out pretty well," said Thiem.
Paco Alcacer put Villarreal ahead after 12 minutes and although Edgar Mendez took advantage of a bad mistake from home keeper Sergio Asenjo 10 minutes before half-time, Gerard Moreno's VAR-assisted penalty allowed Villarreal to retake the lead on the stroke of half-time.