British tennis icon Andrew Castle has revealed his admiration for how Carlos Alcaraz reacted to Jack Draper's triumph at Indian Wells. The 23-year-old last week, defeating Alcaraz in the semi-finals.

has risen to world No 7 following his victory in California, and his career trajectory suggests that he will be the next Brit to compete for Grand Slam titles consistently. That is certainly how two-time Wimbledon champion views Draper's ascent. BBC presenter and former British No 1 has reflected on Alcaraz showing his true colours after the Spaniard admitted that he is looking over his shoulder after Draper's win at Indian Wells.

"Jack has put himself into a different league now and at the moment and on current form, the only player who is better is under a drugs suspension (Jannik Sinner) so right now he is the World No 1, that's it on the players active," Castle told . "When Sinner comes back, he's the No.1.

"Carlos Alcaraz was so honest and what a tremendous sportsman he is. He was so honest and said, 'I was on the bike and was uptight because I was worried about what Jack was going to do and how he was going to play', and that's Alcaraz. I saw him hit a 110mph forehand and win Wimbledon back-to-back."

"All of these wonderful things that he has done and yet he was worried about Jack? That's really honest," Castle added. "I was surprised to hear it but that was incredibly refreshing. So, he knows exactly where he is, he knows where Jack is and now it's game on.

"I think it's great. What a thing it is for us to have over the next few years. It looks to me that Jack has arrived at a point where he can stay. The next level for him, and he has said it, is being a potential Grand Slam winner."

Last year, Draper showcased his potential to win a major title by reaching the semi-finals of the US Open. He has been British No 1 since winning the Stuttgart Open last June and will want to follow in Andy Murray's footsteps by winning Grand Slam titles in the future.

Injuries have previously hampered Draper's potential. However, his immediate focus will be on winning back-to-back titles on U.S. soil at the Miami Open.

"There's no way you can say now that it would be a surprise for Jack to win a Grand Slam during his career, it's been on my mind for a couple of years now," Castle admitted. "In fact maybe longer and he is developing great. The injuries were a slight worry.

"Miami is going to be slightly more demanding than the Indian Wells because the ball doesn't react the same way on the court and there's much more humidity."

Draper will face Czechia's Jakub Mensik in his second-round tie on Saturday. Meanwhile, Alcaraz will face Belgium's David Goffin as he aims to win the tournament for a second time.