Martinez said: "It was a typical cup tie. Stevenage were really really good, a well organised team.
"The first goal is always important. The goal was a little bit of a mistake, a misunderstanding.
"From that point on, I thought we were very good in two thirds, but in the final third we were at times naive.
"At times we didn't show enough sharpness. I couldn't be happier in the manner we kept a good tempo."
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