The singles title at the 1987 Lorraine Open was won by a player whose career high ranking was at what number?
1987 Lorraine Open:  First-seeded Pat Cash won the singles title. Pat Cash:  He reached a career-high ATP singles ranking of world No. 4 in May 1988 and a career-high ATP doubles ranking of world No. 6 in August 1988.
i don't know