Tennis coach Gunter Bresnik sees a lot of promise in Carlos Alcaraz as he thinks the Spaniard could win a Grand Slam as soon as this year if he continues his rapid rise. Alcaraz, 18, has had an impressive start to the year as last month he made it all the way at the Rio Open and now he is enjoying a career-high ranking of No.19 in the world. On Wednesday, Alcaraz defeated Gael Monfils 7-5 6-1 to reach his first Masters quarterfinal in Indian Wells. A match earlier, Alcaraz destroyed Roberto Bautista Agut 6-2 6-0- “He does a lot of lifts on both sides, he serves well, he moves well, he’s not afraid of anything… I repeat, if he continues like this, he can win a Grand …