CNN —While Manchester City manager Pep Guardiola was watching his team play Real Madrid in the first leg of the Champions League quarter-finals on Tuesday, his watch was making headlines around the world. Guardiola was wearing an extravagant Richard Mille watch worth £1 million ($1.26 million) on his wrist at Madrid’s Estadio Santiago Bernabéu, according to TNT Sports, which is owned by Warner Bros. The limited-edition timepiece — one of only 50 ever made — is the lightest mechanical watch ever made, according to the designer, weighing only 18.83 grams including the strap. It was originally designed for 22-time Grand Slam tennis champion Rafael Nadal to wear while playing and so every element was carefully engineered to minimize its weight. Guardiola's Manchester City won the Champions League last year.

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Persons: Pep Guardiola, Guardiola, Richard Mille, Estadio Santiago Bernabéu, Rafael Nadal, Oscar J . Barroso, Antonio Miró Organizations: CNN, Manchester City, Real Madrid, Champions League, Estadio, TNT Sports, Warner Bros, Europa Press, Barcelona FC Locations: Spanish