Glamorgan ended Day 3 of their Specsavers County Championship match against Middlesex on 171/6, still needing a further 385 runs to win.
Marnus Labuschagne scored his fifth half-century of the season to go along with five centuries, while Charlie Hemphrey's resolute 52 not out from 205 balls gave Glamorgan a fighting chance of survival.
"A very disappointing end for us, but the whole game we've probably been a bit behind the eight-ball" said Labuschagne. "Charlie and myself got in but we lost a few wickets there which was disappointing.
"It's still a long way to go in the season talking about promotion, it would be awesome if we did but it's making sure we do those small things right where we've slipped a bit.
"Regardless of the format (of the Australia trial match) I can tell you it'll be competitive, you'll be getting some bouncers but it's exciting to be a part of that.
"It would be great to come back to Glamorgan, but there's so much uncertainty in the next two months, I'll just take the next (trial) game in Hampshire after being here to support the boys (on day four)."