European Top 5 leagues: 77 of the 98 clubs have a main training kit shirt sponsor in 2019-20
77 European Top 5 league clubs (out of 98, or 78.5%) have a main training kit shirt sponsor (front, chest, sleeve or back), as of 17/12/2019. 21 clubs do not have one (1 in the Bundesliga, 3 in LaLiga Santander, 3 in the Premier League, 5 in the Serie A TIM and 9 in the Ligue 1 Conforama).
10 clubs (13%) have a training kit sponsor different...