I don't know the meaning of "to put it up the line", I have an idea but that's it.
"To put him on the wrong foot" means, that he tries/tried to fool him. When it comes to playing tennis and even other sports as well, you can try to fool your opponent by making feints. For example, a soccer player who is dribbling and making feints with his legs
Cheers ... ps: looking forward to the meaning of the other one.
Student or Learner