You may be getting the error: 'Max stake amount is X' preventing you from placing a match bet. This means that you're running into some match betting limits.

We have limits in place to prevent some customers from being too profitable as some may abuse technical aspects, such as arbitrage betting. You will be advised of the max stake amount if you attempt to place a bet over the limit:

Limits vary between users, matches and markets. These limits are issued at our discretion and cannot be negotiated or disclosed usually.