Novak Djokovic may be fanboying One Direction’s Niall Horan this hard for his wife Jelena Ristic. Looks like the world number 1 is using all of his power to become the coolest husband to Jelena Ristic and coolest dad to his baby son Stefan!

The world number 1 congratulated Niall Horan for all his One Direction successes on Twitter this week. He wrote, “@niallofficial Congrats on the new #FOUR album bro. My fans love you & are asking do you have a question for #Nole4U?”

Novak Djokovic strengthened his bond with the One Direction boy during ATP Finals as well. Tennis’ Mr. Congeniality certainly has friends in all places! As a new father to Jelena Ristic’s first baby boy Stefan, the world number 1 may be seeing the world in rose-colored glasses.

Niall Horan definitely enjoyed watching watching his big “brother” play phenomenal tennis. They have been exchanging tickets to each other’s games and concerts. Maybe Jelena Ristic tagged along for the ride as well. When his baby son Stefan gets old enough, he also might take advantage of his father’s relationship with a One Direction member.

So far with the arrival of his baby son, the world number 1 has been floating on cloud nine.

Looks like Novak Djokovic turned one of the One Direction boys into a big tennis fan! Maybe his son will also get to appreciate his father’s taste in music.