Chelsea defender Andreas Christensen has revealed the key to the form under new manager Thomas Tuchel. Andreas Christensen is enjoying a new lease of life under the new manager and has started the last four games in all competitions, a feat that the player admits has not happened for the many years. Andreas Christensen spoke to the official website of Chelsea about the renaissance witnessed under Thomas Tuchel, who was appointed as the new Blues boss last month as the replacement for the sacked Frank Lampard.