Please read the following table in Markdown format and then answer the question according to the table. Table cells in one row are seperated by '|', and different rows are seperated by '
'.

Table:
| Rk | Name | Country | Matches Played | Matches Won | Points | Prize Money (USD) |
| --- | --- | --- | --- | --- | --- | --- |
| 1.0 | Ken Rosewall | AUS | 42.0 | 34.0 | 53.0 | 66400.0 |
| 2.0 | Arthur Ashe | USA | 36.0 | 26.0 | 41.0 | 63150.0 |
| 3.0 | Marty Riessen | USA | 36.0 | 26.0 | 35.0 | 47200.0 |
| 4.0 | Roger Taylor | GBR | 31.0 | 21.0 | 34.0 | 42800.0 |
| 4.0 | Mark Cox | GBR | 33.0 | 23.0 | 34.0 | 31950.0 |
| 6.0 | Brian Fairlie | AUS | 32.0 | 22.0 | 33.0 | 30900.0 |
| 7.0 | Jan Kodeš | TCH | 27.0 | 19.0 | 28.0 | 23800.0 |
| 8.0 | Tom Okker | NED | 29.0 | 19.0 | 25.0 | 34400.0 |
| 9.0 | Roscoe Tanner | USA | 27.0 | 16.0 | 24.0 | 25250.0 |
Question:
What country does the player named Mark Cox play for?
Answer:
GBR