The Portuguese trainer was left ruing their opponent's artificial pitch and his side's lack of lethal instincts, after failing to come out on top in a hard-fought game
An own goal from Jardel was enough to gift the home side the victory, and despite their best efforts in the second half, Benfica couldn't find the clinical touch to convert their chances.
Instead of bemoaning his side's performance however, Jesus sympathised with his players, as he claimed that Spartak's artificial pitch was hard for his side to get accustomed to.
"It would have been important to get a point. We played well enough to deserve one," reasoned the coach, speaking to reporters.
"But Spartak surprised us, and also the fact this is an artificial pitch [influenced proceedings]. We struggled to adapt but we put that right.
"We dominated in the second half and had several chances, but could not score.
"Still, we deserved to leave with a point. Now we have to win both games at home and I think if we do that we can get there [the knockout stages]. We have every chance of winning them," he said.