Czech Republic midfielder Tomas Rosicky has completed a medical at Arsenal and is in talks over a move from German club Borussia Dortmund.
Rosicky joined Borussia Dortmund in 2001
Hans-Joachim Watzke, commercial manager at Dortmund, told Czech paper Mlada Fronta that Rosicky, 25, had flown to London with his manager Pavel Paska.
"I am surprised it did not come to light earlier," said Czech Republic coach Bruckner.
"I must now admit that Tomas is undergoing medical tests."
Rosicky has been a long-standing Atletico Madrid target.
The Czech Republic playmaker has scored 15 goals in 53 appearances for his country.
Rosicky cost Dortmund £18m - a Bundesliga record - when he arrived from Sparta Prague in 2001.