<p>Tommy Docherty dragged the world's biggest football club into the modern era. Between 1972 and 1977, 'The Doc' led Manchester United on a rollercoaster ride of failure and success unmatched at any time in their history.<br>Appointed manager in late 1972 when the club was at their lowest post-War ebb, Docherty dismayed many with muscular tactics in his efforts to keep the club in the top flight. But after initial problems, not least relegation ...