They're two of the club's most important players but Western Sydney coach Tony Popovic isn't in any rush to secure the services of marquee man Shinji Ono and midfielder Youssouf Hersi beyond this season.

Former Japanese international Ono showed just why he's so key to the club's success in the Wanderers' 2-0 derby win over Sydney on Saturday, setting up the first goal and scoring the second.

"He probably doesn't take enough credit himself for what he's done here with our club," Popovic said of the 34-year-old on Monday.

"It's not just on the field I think he's brought a real level of professionalism to the playing group.

"He's been to three World Cups, he's done everything in the game and he still wants to get better every day."