Andy Murray has aspirations to join older brother Jamie at the top of the rankings.
Andy, 28, is currently at a career-high No. 2, while his 30-year-old brother reached No. 1 in doubles a few weeks ago.
"It would be incredible to reach the top of my sport,” Andy told the Madrid Masters’ official website. “It's something you dream about since you were a child. My brother just got himself up to No. 1 in doubles, and it would be incredible to say we both reached the top position during our careers."
But the Brit trails world No. 1 Novak Djokovic by a lot. He’s currently sitting on 7,925 points, whereas Djokovic has an incredible 15,550.
Murray will be the defending champion in Madrid, where he defeated Rafael Nadal in the final a year ago to take his first Masters tournament on clay.
"It was probably the best I've done on clay," he recalled. "I spent two weeks in Barcelona training, which helped with my tactics and movement. I won my first title on clay at Munich the week before, so I came with a lot of confidence to Madrid."
Murray and Nadal have been practicing in Mallorca ahead of the tournament, which begins on May 1.
"In my opinion, Nadal is still one of the best players on clay,” Murray said, “and [he’s] still working as hard as possible on and off the court.”