Man City play Barcelona tonight and Bet 365 are running their free money offer again.
Or as they call it the free in play bet offer.
If you don't take advantage of this offer every time it runs you're just throwing money away.
To recap all you have to do is place a bet of up to £50 on the match before kick off and you will get a free £50 bet in play.
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Personally I like to lay off the pre match bet and then use the free in play bet to try and win some money.
But if you want to guarantee profit then you can lay off both bets and guarantee yourself around £35 profit.
For the pre match bet I would go for something at low odds, just because it means I need less funds in my Betfair account, although on the flipside it does mean it's more likely that money will move from your Betfair account to your Bet 365 account.
If you want to lay off the in play bet to guarantee a profit then you can use the calculator here to work out your stakes.
The best time to bet and lay off in play is at half time when the prices will be stable.
When you use the calculator for the in play bet, make sure not to tick the stake return box.