IDIOMS

come to someone's rescue

(idiomatic) To rescue (or save) someone from further harm

Example: 2010 December 29, Chris Whyatt, “Chelsea 1 - 0 Bolton”[1], BBC:
  With the hosts not able to find their passes - everything that went forward was too heavy or too short - Terry once again had to come to his side's rescue after Davies had brilliantly nodded into the path of Elmander, who followed up swiftly with a deflected shot.