Glenn McGrath has admitted that he will be disappointed if Australia do not complete the first-ever whitewash of the West Indies in the Caribbean.

McGrath, who missed the first two Test matches because of his wife's illness, arrived last week from Australia for the remaining two Tests.

"I think the way we are going it would be very hard for us to be beaten," said McGrath, who participated in the six-wicket victory over the University of the West Indies (UWI) Vice-Chancellor's XI at the 3W's Oval at Cave Hill Campus on Monday.

"I would probably be very disappointed if we don't win the series 4-0 but we will take it one game at a time," McGrath added.

The 33-year-old admitted it was an unusual feeling watching his team rather than playing with them but wants to make up for lost time.

"It's always different watching rather than playing," McGrath said. "I would always prefer to be in the West Indies before, playing, but I had no doubts that the guys we had here were good enough to do the job.

"They went out there and played some good cricket. We have very good bowlers and they took 20 wickets in both games to win us the Test matches."

And McGrath revealed that his wife's health is progressing well and making it easier for him to play and do well for Australia.

"My wife is not too bad now," McGrath said. "I speak to my wife every day and each time I talk to her she feels better than she did the previous day.

"I wouldn't be here if there was any problem or doubt about her health.

"She is happy for me to be here and enjoys me playing and wants a bit of normality back in her life."

McGrath has already taken 422 wickets in 91 Test matches at an average of 21.45 and hopes to add to his total in the remaining two Tests.

He believes his three wickets in the warm-up game provided a great opportunity for him to fine-tune his preparation for the third Test which starts in Bridgetown on Thursday.

"I was just using the opportunity to get a few overs under my belt," McGrath added. "My last bowl was in the World Cup finals in South Africa and this is a good outing as I try to get back to match-fit bowling.

"I am feeling good. I was feeling jet-lagged a little earlier on but as the game progressed I felt better, hopefully I can continue feeling this way leading up to the Test."

And the Australian paceman is looking forward to pitting his wits against West Indies captain Brian Lara again despite his long lay-off.

McGrath added: "I just have my normal plans for Lara. I think the wickets in this series have been a bit dead and slow which I feel will favour the batsmen but I always enjoy the challenge of bowling to Brian."

And McGrath wants to continue playing Test cricket and continue taking wickets for the foreseeable future.

"The motivation and enjoyment is still there," he said. "Taking wickets is motivation. I'd like to get to 500 Test wickets one day.