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:
| Res. | Record | Opponent | Method | Event | Round | Location |
| --- | --- | --- | --- | --- | --- | --- |
| Loss | 7-5 | Gary Goodridge | Decision (split) | PRIDE 21 | 3 | Saitama , Japan |
| Win | 7-4 | Mindaugas Kulikauskas | Decision | Rings Lithuania: Bushido Rings 3 | 2 | Lithuania |
| Loss | 6-4 | Andrey Juravkov | Decision | BARS - BARS | 3 | Moscow , Russia |
| Win | 6-3 | Stanislav Nuschik | TKO | BARS - Moscow vs St. Petersburg | 2 | Moscow, Russia |
| Loss | 5-3 | Islam Dadalov | Decision | IAFC - Pankration Russian Championship 2001 | N/A | Yaroslavl , Russia |
| Loss | 5-2 | Antônio Rodrigo Nogueira | Submission (armbar) | Rings: King of Kings 2000 Block A | 1 | Tokyo , Japan |
| Win | 5-1 | Vepcho Bardanashvili | Submission (achilles lock) | Rings: Russia vs. Georgia | 1 | Ekaterinburg , Russia |
| Win | 4-1 | Valentijn Overeem | Submission (achilles lock) | Rings Russia: Russia vs. The World | 1 | Ekaterinburg, Russia |
| Win | 3-1 | Vyacheslav Kiselyov | Submission (armbar) | IAFC - Pankration World Championship 2000 [Day 1] | 1 | Moscow, Russia |
| Loss | 2-1 | Lee Hasdell | TKO (kick) | Rings: King of Kings 1999 Block A | 2 | Tokyo, Japan |
| Win | 2-0 | Zabir Elbiev | TKO (cut) | IAFC - Pankration Russian Championship 1999 | 1 | Russia |
| Win | 1-0 | Denis Shibankov | Submission (strikes) | IAFC - Pankration European Championship 1998 | 1 | Moscow, Russia |
Question:
The match against Valentijn Overeem had what method?
Answer:
Submission (achilles lock)