Arsene Wenger was happy with another “positive” display at Hull but will investigate why Santi Cazorla did not take a first-half penalty.
Many were surprised to see Alexis Sanchez line up for the spot-kick just before the break and more questions were asked when the Chilean missed.
It did not have too much bearing on the final result at the KCOM Stadium but Wenger has said he will re-establish a clear pecking order.
“Santi was down to take it,” Wenger told the BBC. “I don’t know why it did not happen, they have pecking order, it was not planned for Sanchez to take it.
“I want to know what happened and for it not to happen again. Overall anyone can miss a penalty, we have to accept that.”
Wenger was pleased with what he saw after coming through a tough Champions League battle and believes the missed penalty sharpened the Gunners’ focus.
“I feel overall it was a positive performance after playing away in the Champions League and away again today,” Wenger added.
“We started well, dominated and were fluent. They defended well but overall we managed to score the goal then after the missed penalty we had to be serious and score the next goal.”