On Friday, Jagr wrote, "I am very happy to confirm that everything was successful even in such a short time. Now our only wish is to sell out the O2 Arena. Buy a ticket and help those Ukrainian families in the Czech Republic!"
O2 Arena is Sparta's home arena, but Kladno was the home team for the 4-1 loss.
Jagr has played for Kladno for four seasons since leaving the NHL following 2017-18. The 50-year-old forward scored 766 goals, third in NHL history behind Wayne Gretzky (894) and Gordie Howe (801), in 24 seasons for the Pittsburgh Penguins, Washington Capitals, New York Rangers, Philadelphia Flyers, Dallas Stars, New Jersey Devils, Florida Panthers and Calgary Flames.
Jagr is two goals ahead of Capitals forward Alex Ovechkin. He ranks second in points (1,921) behind Gretzky (2,857)
Jagr won the
Art Ross Trophy
as the leading scorer in the NHL five times, the
Hart Trophy
voted as NHL most valuable player in 1998-99, and the
Stanley Cup
with the Penguins in 1991 and 1992.
He chose his uniform No. 68 to remember 1968, the year Soviet tanks entered Czechoslovakia to stop the Prague Spring.
"I would like to thank everybody who participated and helped," Jagr said. "The final score shows one team that won and the other team that lost the game, but this is a secondary thing. I think today, everybody won."
NHL.com/cs independent correspondent Michael Langr contributed to this report