The win was a relief for the German coach and the struggling defending champions as they have scored only one goal in the opening three games, which was the worst record for the capital club since the 1984-1985 season.
Flick admitted, "We're not yet at our highest level." At the same time, the coach is aware that they possibly won't reach it this season, especially when competitions are in the final stages. Enditem
The second, decisive match will take place on September 30 in Salzburg, with the winner on aggregate to qualify for the Champions League's group stage. Enditem
The 23-year-old broke the deadlock in the 74th minute by thumping in a long-range effort after combining with Darlan Mendes.
"I have come to the difficult decision to skip the clay court swing this year and will be taking the remainder of the season off to focus on my health and my training," the world number seven said.
Djokovic beat Norway's Casper Ruud 7-5, 6-3. The Serb will face eight-seeded Argentine Diego Schwartzman in the men's final.
Aston Villa also had goalkeeper Emiliano Martinez to thank for a first half penalty save to deny John Lundstrum when the scores were still level.
A few weeks ago, Union Berlin striker Sebastian Polter was suspended following a corona-based wage dispute.
Seventh-placed Marseille needed a late header from substitute Valere Germain to clinch a 1-1 home draw with Lille in the latest match of the day. Brazilian forward Luiz Araujo helped Lille take the lead at the start of the second half and could have doubled it when his effort hit the cross bar in the 65th minute.
Knowing that a two-goal margin win would secure their place in the Round of 16 alongside Al Ahli and ahead of Al Shorta, Esteghlal pressed hard from the outset and opened the scoring in the 29th minute when Mehdi Ghaedi, assisted by Farshid Esmaeili on the edge of the box, drilled a powerful drive that nestled into the bottom corner despite Al Owais' best efforts to save the shot.
The second half witnessed the prowess of Shanghai captain Hulk. The Brazilian striker hit the crossbar in the 55th minute with his iconic long distance shot and then converted a penalty in the 71st minute.