Midfielder Jason Hicks and striker Hamish Watson have joined the Wellington Phoenix squad ahead of tomorrow's A-League match in Adelaide.

The Phoenix have stayed across the Tasman this week following last Friday's stunning 4-1 win over Central Coast.

Coach Ernie Merrick says although the side is injury-free, they'd always planned to fly the two extra players over as cover for the second game of their away double.

"We felt we'd bring over a midfielder and striker and the thing about being away from Wellington is that it's convenient in the lead-up to the next match but with all the travelling you miss out on training time with the squad.''

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Merrick says he has no reason to make any changes unless there's any late injury, and he will keep consistency if he can.

Merrick's long-standing working relationship with striker Carlos Hernandez is being seen as an influential factor to the side's A-League form.

Hernandez played under Merrick at Melbourne Victory, and has been a crucial difference to the Phoenix's resurgence this season.

Merrick says Hernandez was a top performer at the Victory, and has gone through some changes since joining the Phoenix.

He says Hernandez is now five kilos lighter, and he's struck up a great partnership with Stein Huysegems up front.