The 52-year-old replaces Alfonso Sosa, who was sacked on Friday after a 2-0 home defeat to Leon, a result that left Necaxa 15th in the 18-team standings with just two wins from eight matches.
PZPN gave a quick response to these accusations. "It's true Hertha wanted Piatek returning to Germany instead of playing in Bosnia and Herzegovina, but we didn't give a green light. They even contacted FIFA, who claimed that there is no rule that allows clubs to demand such things from national teams," said PZPN's spokesman Jakub Kwiatkowsi to the local media on Monday.
"As for the disqualification, I need to go back within and work on my disappointment and turn this all into a lesson for my growth and evolution as a player and human being."
"My team has adapted to the training system of the South Korean style. Although the preparation period of the season has been greatly prolonged due to the COVID-19 pandemic, all the players have shown very positive attitudes in these months," the South Korean said.
Inter Milan midfielder Barella headed home in first-half stoppage time after receiving a long pass from Ciro Immobile, with the goal enough for Italy to clinch three points in Amsterdam.
The success of clubs and coaches strengthens the Bundesliga's position in European football, against the English Premier League, Spain's La Liga, the Italian Serie A, and France's Ligue 1.
After dropping his serve to trail 6-5 behind in the first set of his fourth round match against Pablo Carreno Busta of Spain, Djokovic angrily smashed a ball in frustration, accidentally striking the line judge in the neck and causing her to fall to the ground.
"It's going to be one of the young guys, I think, if you count Dominic Thiem as a young guy, as well. He obviously has a chance to win. Now I think it is the time where it gets really interesting. We'll see where we go from here," added the German.
Mena struck in the 41st and 51st minutes at Estadio Victoria as the visitors secured their fifth win from eight matches.
Elsewhere, Canadian rising star Denis Shapovalov stunned seventh seed David Goffin of Belgium 6-7 (0), 6-3, 6-4, 6-3 to make last eight, while Croatia's Borna Coric also advanced.
Kosgei was later disqualified for stepping onto the infield in the closing stages.