Defending champion Mats Wilander, two-time titlist Johan Kriek and fifth-seeded Pat Cash moved into the quarterfinals yesterday of the Australian Open tennis tournament in Melbourne.

In women's play, Chris Evert Lloyd defeated Sophie Amiach, 6-2, 6-1, to advance to the semifinals against Wendy Turnbull. Turnbull beat Sharon Walsh, 7-5, 6-2. Also gaining the semifinals was Helena Sukova, who upset third-seeded Pam Shriver, 6-2, 6-7, 6-1.

Wilander, the No. 2 seed, beat Stefan Simonsson, 2-6, 6-1, 5-7, 6-2, 6-3. Wilander next meets Davis Cup teammate Stefan Edberg, a 6-2, 6-2, 6-2 winner over Lloyd Bourne.

Kriek, the No. 4 seed, beat Australian teen-ager John Frawley, 6-4, 6-3, 6-2, and will play Cash, who delighted his hometown crowd with a 7-6, 6-4, 7-5 victory over John Sadri. Another quarterfinalist is Boris Becker, a 7-6, 6-4, 6-3 winner over Guy Forget.

Top seed Ivan Lendl moved into the fourth round with a 2-6, 6-2, 6-4, 6-4 victory over Tarik Behabiles.

Officials announced the tournament will not be played on grass after 1986, leaving Wimbledon as the only Grand Slam event played on grass.