The Gunners are in Turkey for the first leg of their qualifying match, where they will be taking on the Istanbul giants.
Arsene Wenger’s men kicked off their Premier League campaign with a victory on Saturday, beating Palace 2-1 at the Emirates Stadium.
The win was, however, far from routine, with the Londoners having to battle back from a goal down to over come the Eagles with what was described by many as a laboured performance.
Sansom – who made over 300 appearances for Arsenal – is adamant that if they don’t significantly improve on their showing against the Eagles, Besiktas will punish them:
“If they play like they did against Palace they’ve got no chance. That was one of the worst passing performances I’ve seen from them in a long time.” He told talkSPORT.
“It looked like they were half asleep. I’ve never seen it before, it was amazing. I don’t know how many times they gave the ball away under no pressure.
“Wenger has said the season has come too early [for Arsenal] and it’s going to be tough [against Besiktas]. But they need to qualify. They want to be in Europe and competing with the best.”