Bologna coach Sinisa Mihajlovic has admitted frustration over Takehiro Tomiyasu's sale to Arsenal.

The Japan defender was sold by Bologna on deadline day.

"I was happy about Bologna's transfer window, now a bit less," Miha said during the Premio Menarini.

“We had planned Tomiyasu's exit, but it bugs me to see him leave five or six hours before the end of the summer transfer window."

Arsenal coughed up €23m to sign Tomiyasu this week.