Table:
text: 1991 ATP Championship Series, Single Week
Singles
Singles
Tournament Surface Week Winner_and_score Finalist Semifinalists
Montréal Hard July 22 Andrei Chesnokov 3–6, 6–4, 6–3 Petr Korda Ivan Lendl Jim Courier
Cincinnati Hard August 5 Guy Forget 2–6, 7–6(4), 6–4 Pete Sampras Boris Becker Jim Courier
Stockholm Carpet (i) October 21 Boris Becker 3–6, 6–4, 1–6, 6–2, 6–2 Stefan Edberg Aaron Krickstein Jim Courier
Paris Carpet (i) October 28 Guy Forget 7–6(9), 4–6, 5–7, 6–4, 6–4 Pete Sampras Michael Chang Jonas Svensson

Question: What week was the tournament of Paris under the ATP Championship Series 1991, Single Week?