To ride your luck means to be lucky.

So, in this example, we can see that City were a little lucky (Inter hit the crossbar and their goalkeeper made some great saves) but it didn't matter as the result was the most important. 

Here's another example from the BBC:

1. ...especially as Baldock rode his luck by avoiding a second yellow when he fouled Diogo Jota with 10 minutes left.

https://languagecaster.com/english-for-football-expression-to-ride-your-luck/

Ireland will be gobsmacked to come away with just a point. Scotland rode their luck but come away with a point from their closest rivals (BBC.co.uk - 2015)

This means that Scotland were lucky to draw with Ireland