Career
He has been a Polish top division referee since 1999 and on the Fédération internationale de football association referees list since 2006. He was the only Polish referee nominated for Union of European Football Associations Euro 2012. Borski has served as a referee in international competitions, including the 2010 and 2014 World Cup qualifiers.
He used to work as stock exchange analyst for Warsaw Stock Exchange and Ministry of Treasure of Republic of Poland before becoming fulltime professional referee in 2008.
In April 2008 he became participant of Union of European Football Associations Talents Programme, special mentoring programme aimed to develop young, promising referees. He participated in this programme for two consecutive years.
In April 2009 he was chosen by "Pilka Nozna" magazine as the best referee of 2008/09 season of Polish top division. In December 2011 he was nominated by Union of European Football Associations to be fourth official during the Union of European Football Associations Euro 2012 tournament.
At the same time he was promoted to Union of European Football Associations Elite Development category of referees.