Antonio Conte has expressed his frustration at referee Bobby Maddley's failure to award his side a penalty after Willian went over in the box.

The Chelsea midfielder was subsequently booked for diving, however, replays showed that Arsenal defender Hector Bellerin clipped the Brazilian's heels.

The Gunners eventually won the match on penalties after Sead Kolasinac's debut goal for Arsenal cancelled out Victor Moses's opener.

"I didn't see, honestly, the images and I didn't see also the yellow card for Willian. A lot of people told me that the penalty was clear," said Conte.

"For sure, there is a bit of frustration. You know very well that you must accept the referee's decision, but sometimes this decision makes you a bit angry.

"He tried to explain to me his decision, but there wasn't time. I wanted to ask him why there wasn't the penalty for Willian and about the yellow card. But then we would have stayed there until nine o'clock!

"I repeat we must accept the decision, but if you remember in the FA Cup there was also a controversial decision against us.

"This game was a tough game for both teams. We tried to win and we tried to improve our physical condition because in six days we have to start the league.

"But now the most important thing is to continue to work and try to improve our team."

Chelsea open their Premier League campaign with a home match against Burnley on August 12.