Complex sentence: This round will be contested over two legs in a home-and-away system, with the first leg played on 3--4 February 2016 and the second leg played on 2--3 March 2016.
Split into simpler sentences: This round will be contested over two legs in a home-and-away system. First leg matches were played on 3--4 February 2016 and second leg matches will be played on 2--3 March 2016.