PAOK fans are known to be vociferous and one of the noisiest in Europe, which makes the Toumba Stadium a hard ground for the visiting side.
PAOK fans are known to be violent at times, and Chelsea fans were warned before the game.
A club statement read: “We are grateful to the Greek authorities for making us aware of their stipulations well in advance of the game but we strongly advise that this match will not be appropriate for all of our supporters to attend.”
Due to security fears, Chelsea had previously advised supporters not to wear replica kits or other club apparel outside of the stadium and that they should travel on coaches rather than alone.
Reports now claim that two Chelsea fans were wounded ahead of the game against PAOK.
According to Associated Press, Greek police have reported that two English fans were injured after an attack in the city centre by three suspects who evaded arrest but are believed to be PAOK supporters.
The two Chelsea fans were treated for their injuries by an ambulance crew but opted against going to hospital. They have also decided not to press charges against their assailants.
About the incident, Liam Twomey tweeted: “Just spoke to Thessaloniki police. They say the two Chelsea fans were drunk when the fight started (around 5am), sustained light injuries & were taken back to their hotels when they declined hospital.
“Police insist they have no wider concerns about security around the game #cfc”
Only a small section of Chelsea fans made the trip to Greece to support the Blues due to fears of violence. Just last month, five Burnley fans were injured in Athens during their Europa League play-off with Olympiakos, and one of whom suffered a stab wound to the leg.
Despite the vocal fans and minimal Chelsea support, Maurizio Sarri’s men dominated the game from start to finish and were only unlucky to have won just by one goal.