Conversation so far:
When did Graf start Steffi Graf's post career exhibition matches?
In late 1999 and early 2000, as part of her Farewell Tour.
Who did Graf play for in her exhibition matches?
She played Jelena Dokic in Christchurch, New Zealand, Amanda Coetzer in Durban, South Africa, and her former rival Arantxa Sanchez Vicario in Zaragoza, Spain.
Did she perform well?
In February 2000, Graf played against Kimiko Date at Nagoya Rainbow Hall in Tokyo, winning in three sets.
Did she play for charity during her exhibition career?
Proceeds from her match against Sabatini went to Graf's foundation, "Children for Tomorrow".
Did Graf play in the United States at all?
In 2010, Graf participated in the WTT Smash Hits exhibition in Washington, D.C.
to support the Elton John AIDS Foundation.

Question: When did sha play her last exhibition?
Self-contained rewrite: When did Steffi Graf play her last exhibition match?