The ice-cold expression on the face of Erling Haaland was a clear summation of Borussia Dortmund’s situation as the one-time title hopefuls reached the Bundesliga winter break with their dreams surely shattered. Saturday’s 3-2 defeat away to Hertha Berlin – having led 1-0 at half-time – has left Dortmund nine points behind leaders Bayern Munich with 17 games remaining from early January. Haaland’s silence post-match was probably the best Dortmund could expect from the 21-year-old, who is viewed as one of the hottest properties in world football. Nice words for Christmas or a declaration of loy…