to get over the li

In this extract, “get over the line” stands for ‘display that little (decisive)extra’?
Thank you.

What is the runner-up lacking?
"City have lacked the mental strength to get over the line and, recently, their away performances have been poor.

“get over the line” means to manage to complete a task (a reference to crossing the finishing line in a race). In this case “get over the line” presumably means “manage to win matches”.