Kroos said a boycott campaign was unlikely to have much effect but drawing attention to human rights issues during the tournament could help.
Ibrahimovic, 39, played his last Sweden game at Euro 2016 before wearing his country's yellow shirt again for the 117th time in their Group B opener.
The Qatar skeet team have won three medals (a silver and two bronze) so far at the ongoing World Cup here at the Dr Karni Singh Shooting Range.
The 39-year-old was knocked out of the Doha event by world number 42 Nikoloz Basilashvili of Georgia, squandering a match point in the deciding set.
The 20-time Grand Slam title winner, who underwent two knee surgeries in 2020, secured the first set but eventually wilted and lost the quarter-final tie, 3-6, 6-1, 7-5.
It was Federer's first match in 405 days after having knee surgery following the 2020 Australian Open.
The International Olympic Committee used its new, more flexible bidding process last week to name the Australian coastal city its preferred choice more than 11 years before the Games.
The pair of Mirza and Klepac defeated Ukranian's pair of Nadiia Kichenok and Lyudmyla Kichenok 6-4 6-7(5) 10-5 in the opening round.
Jennifer Brady lost in her first match since the Australian Open final, falling to Anett Kontaveit 6-1, 6-2 in the first round of the Qatar Open.
The agreement was signed between representatives of the two countries here on Friday, in the presence of Prime Minister Imran Khan, according to Special Assistant on Petroleum Nadeem Babar.
Copa America, initially scheduled for last year and postponed because of the pandemic, will be hosted by Argentina and Colombia.
Fowler was part of the England side which reached the quarter-finals of the first-ever World Cup to be held in Asia, back in 2002.
Egypt, which also participated in the yearslong boycott, has not publicly elaborated on its restoration of ties with Qatar.
The period in between was bitter, with mud-slinging by both sides and viscous media blitzes, social media trolling, expensive lobbying efforts in Washington, and allegations of hacks and leaks.
Sheikh Tamim is expected to attend a signing ceremony with Prince Mohammed to declare a new page in relations.