Wie on verge of clinching LPGA Tour place

(CNN) -- Only a stunning final-day collapse can keep Michelle Wie from claiming a spot on the 2009 LPGA Tour after she fired a four-under-par 68 in Saturday's fourth round of qualifying.

The 19-year-old, who must finish in the top 20 to grab a coveted berth on the elite women's series, is second on 14-under par 274 after 72 holes in the five-day, 90-hole showdown, being played on two courses.

American Stacy Lewis fired a 66 to grab the lead on 16-under-par 272 followed by Wie and a trio on 275 --American Mollie Fankhouser, South Korean Amy Yang and Japan's Shiho Oyama.

All of the leaders played the Champions course rather than the harder Legends layout.

The field has now been trimmed to 70 for Sunday's final round, where 20 spots on next year's LPGA Tour will be decided.

After four rounds, the top-20 cut-off was on five-under-par.

Wie has failed to match her considerable promise since becoming the youngest player to make a cut in an LPGA event, a feat she accomplished at the age of 13 in the 2003 Nabisco Championship.

Battling a wrist injury, she has endured a disappointing 2008 campaign, missing three cuts and being disqualified from another tournament in nine LPGA events.