Former international defender makes candid admission over Old Firm transfer.A two-time Champions League finalist admits that it was his dream to play for Celtic or Rangers in an Old Firm derby as part of his illustrious career.Former Atletico Madrid defender Toby Alderweireld won league titles in the Netherlands, Spain, and Belgium during his successful 17-year career. He was also a key part of the Belgium squad that finished third at the World Cup in 2018.Capped 127 times by his country, he played at the highest level and reached the final of the Champions League with Atletico Madrid and Tottenham Hotspur, but confessed that one of his biggest career regrets is that he never had the chance to sample an Old Firm derby as a player, revealing that he used to watch the fierce rivals battle on TV regularly.Alderweireld was a two time Champions League finalist, reaching the final of the competition with Atletico Madrid and Tottenham Hotspur…