Navarro told BBC Sussex : "I think it's down to fatigue. They've played a lot more games than other teams, hopefully we can take advantage of that."
Albion are without a win in their last six games.
Navarro added: "People talk about Beckford because of his goals but they've got quality all over the squad.
"They have players who can hurt you if switch off for just one second so we need to be on our toes for the whole 90 minutes."
Source: BBC Sport
Source: BBC Sport