The 30-year-old departed the Wanderers in September 2020 after scoring 14 goals in 26 matches in the chaotic 2019-20 season.
At the time it was reported that the Wanderers had offered Duke a contract, but the move to Saudi Arabia proved too lucrative to turn down.
Duke scored one goal in 18 matches for the club, however, if he rediscovers the form he had in the A-League it will come as a much-needed boost for the Wanderers who have scored just five goals in five matches so far this season.
"Duke will depart Saudi Arabia immediately and will return to Western Sydney in the coming days to complete hotel quarantine," the club said in a statement.
Duke grew up in Western Sydney and said he was delighted to be returning.
“I’m very thankful to the Wanderers, Chairman Paul Lederer, CEO John Tsatsimas and head coach Carl Robinson for giving me this opportunity to return to my hometown club,” Duke said.
“The Wanderers are my family and I’m so proud to put the Red & Black hoops back on again for what is set to be a huge season for our club and region.”
Western Sydney Wanderers head coach Carl Robinson said he’s excited to see what Duke can produce for the Wanderers this season.
“We’re excited to welcome Mitch home, he’s obviously a wonderful talent and will be a great addition to the squad,” said Robinson.
“We’re building something special here at the club, Mitch will add to that both on and off the field. His relationship with the playing group and the people of Western Sydney is second to none and I for one am excited for what this squad will produce this season.”
Western Sydney Wanderers CEO John Tsatsimas said the door was always open for Duke and his family.
“It is fantastic to have Mitch back at the Wanderers. We have always kept an open dialogue and when the opportunity surfaced, both club and player didn’t hesitate to embrace the opening,” said Tsatsimas.
“Mitch will significantly add to what we believe is a very good side assembled under Carl and we look forward to him exhibiting his known skill and unqualified determination to the cause.
“He comes to a place he calls home and knows like the back of his hand, and will hit the ground running. We can’t wait to see him in the Red & Black again very soon.”