Celtic have identified Augsburg talent Arne Engels as a potential addition this window, but they may need to dominoes to fall to clear the path for their pursuit to progress. The 20-year-old has emerged as one of Brendan Rodgers’ top targets before the deadline and is capable of playing in central midfield, an advanced role or at right-back. Setting the bar high, his current club value him at £9 million. Nevertheless, not only are they prospectively willing to cash in on the Belgium Under-21 international, but he would prefer a move to Celtic over joining Ligue 1 outfit Rennes. Why has he adop…