Melbourne Victory suffered a double blow on Thursday as the home side lost an A-League trial match 2-1 to Adelaide United and Victory skipper Mark Milligan limped off with a right-knee injury.

Milligan, who was rested for the first half, was assisted from the field in the 77th minute at AAMI Park in a game played behind closed doors. However a Victory spokesman said the injury did not appear to be serious.

The Victory skipper went into the match with strapping on his right knee. Milligan's men will open their season with a derby clash against Melbourne Heart on October 12 while Adelaide United host Perth Glory the following day.

Jeronimo Neumann scored for Adelaide United in the 23rd minute after the Victory failed to clear the ball from their goal and the Argentine striker calmly slotted the ball past the home team's goalkeeper Nathan Coe.

The Victory's striker Archie Thompson aimed a full-blooded shot at goal just a few minutes later but it was blocked by Adelaide's Eugene Galekovic.

Victory's Connor Pain ran onto a long ball and sent a powerful shot wide midway through the second half.

Adelaide's Tarek Elrich tapped in a fine cross from Awer Mabil in the 72nd minute to crush any hopes of a revival from the home side.

Kosta Barabarouses scored a late goal for the Victory in the 83rd minute.

The Victory's James Jeggo was yellow-carded in the final minute for a tackle on Jordan Elsey.

Thursday's loss is Victory coach Ange Postecoglou's third in the pre-season following defeats against Brisbane and Newcastle and a 3-0 win over Western Sydney last weekend.

Victory assistant coach Kevin Muscat said Milligan was in no doubt for round one.

"He took a knock to his knee so there was no point keeping him out there. He'll be fine," Muscat said.

"We'll certainly be ready for round one.

"It was a good hit-out for us. We've still got to really do some work and concentrate for longer periods.

"We were dangerous going forward a number of times. With a little bit more quality, a little bit more patience, we could have created some more chances.

"It was disappointing to concede the goals in the manner we did."

Adelaide's new coach Josep Gombau said Brent McGrath had been signed on a four-week contract to replaced injured forward Bruce Djite.

Gombau said the Reds would look at a possible one-season deal for McGrath. The 22-year-old made his Socceroos' debut in 2011 against Germany.

First-year Adelaide coach Gombau said he was pleased with the way his side had embraced his playing style.

"We are doing things faster. I am surprised because it is not easy," the Spaniard said.

"The Australian players like to work a lot. They concentrate when you explain something.

"We are doing things that I expect them to do maybe after Christmas."