Marsch successfully navigated a string of injuries to experienced players to claim a win in the season opener against Wolves last weekend.
Crucially, United are currently without a recognised senior left back after Junior Firpo picked up a knee issue on tour in Australia.
The club subsequently sold 22-year-old left-back Leif Davis amid calls from fans for Leeds to use the transfer window to strengthen in that position.
Against Wolves on Saturday, though, Marsch was pleased with how Pascal Struijk, naturally a central player, filled in.
“I thought Pascal defended well and was good on set piece,” Marsch said.
“He played really well. So really happy, really happy with him.”
Though Firpo is said to be ahead of his recovery schedule, the Spaniard won’t be available for the Saints clash - forcing Marsch once again to improvise at left-back.
Here is a breakdown of all the Leeds United players currently working their way back to full fitness:
1. Liam Cooper - unavailable
The Whites skipper’s wait to reclaim the armband goes on. Cooper hasn’t returned to training properly since picking up an achilles issue on a treadmill while working through his off-season programme.
2. Adam Forshaw - unavailable
The midfielder is close to a return after working his way back from a knee injury. Marsch expected Forshaw to be back in training this week but he won’t be ready for Southampton.
3. Luis Sinisterra - unavailable
The winger suffered a thigh injury against Crystal Palace in Australia - Marsch hoped that Sinisterra would be back in training this week and anticipates that the summer signing could feature against Chelsea next weekend.
4. Junior Firpo - unavailable
The defender injured his knee during Leeds’ pre-season friendly against Crystal Palace. A scan showed that Firpo is ahead of schedule with his recovery and Marsch anticipates a return in two or three weeks.
5. Luke Ayling - unavailable
Ayling went under the knife for a long-standing knee injury earlier this year. In his pre-Wolves press conference, Marsch revealed that Ayling could be back in training in the next couple of weeks as the full-back is ahead of schedule with his recovery.
6. Stuart Dallas - unavailable
The Whites’ utility man is a long way of returning to action after suffering a femoral fracture during United’s 4-0 defeat to Leeds in April. Six months was the predicted recovery period after Dallas underwent surgery, and Marsch reported this week that he’s making good progress.