March was filled with a number of exciting hardcourt tournaments, but the tour will now shift to clay. A total of 13 competitions across the ATP and WTA tours will be held in April.The actions kicks off in Houston (ATP) and Charleston (WTA), with ATP and WTA 1000 events scheduled to take place later in the month.So without any further ado, let’s take a look at the tennis schedule for the month of April:ATP 250 tournamentsU.S. Men's Clay Court Championships: 4-10 AprilThere won't be too many big names competing in Houstonb. Casper Ruud was the top seed and the only top-10 player in the draw. However, he withdrew due to injury.The competition is headlined by Nick Kyrgios, Taylor Fritz, Reilly Opelka, John Isner and Jenson Brooksby. Reigning champion Cristian Garin is seeded fifth in the tournament.Grand Prix Hassan II: 4-10 AprilThis is the 36th edition of the Grand Prix Hassan II and the first time it is taking place since 2019. Benoit Paire won the last edition of the tournament but he will not compete in 2022. Felix Auger-Aliassime is the top seed and a heavy favorite to triumph.The likes of Dan Evans, Albert Ramos-Vinolas and Federico Delbonis are also in the mix.Serbia Open: 18-24 AprilThis year's Serbia Open will be headlined by World No. 1 Novak Djokovic. Andrey Rublev and Gael Monfils are also in the draw, but defending champion Matteo Berrettini is expected to miss out due to injury.Estoril Open - 25 April - 1 MayThis year's Estoril Open in Portugal will feature four players ranked in the top 20, including Felix Auger-Aliassime, last year's runner-up Cameron Norrie, Diego Schwartzman and Pablo Carreno Busta. Albert Ramos-Vinolas won the tournament in 2021. BMW Open - 25 April - 1 MayThis year's BMW Open in Munich will play host to the likes of Alexander Zverev and Casper Ruud. Reigning champion Nikoloz Basilashvili will return to defend his title.WTA 250 tournamentsCopa Colsanitas - 4-10 AprilThis is the first WTA 250 tournament that will take place in April. With most players competing in the Charleston Open, the top seed at the Copa Colsanitas tennis tournament in Bogota is local favorite Camila Osorio.The Colombian won the tournament last year by beating Tamara Zidansek in the final. She has a fair chance of defending her title in the absence of star power.Istanbul Cup - 18-24 April The 15th edition of the Istanbul Cup will take place in April, with Veronika Kudermetova, Elise Mertens and reigning champion Sorana Cirstea slated to participate.ATP 500 tournamentsBarcelona Open - 18-24 AprilThe 69th edition of the Barcelona Open is expected to feature the likes of Rafael Nadal, Stefanos Tsitsipas, Casper Ruud, Hubert Hurkacz, Cameron Norrrie and Jannik Sinner, among others. However, Nadal's participation in the competition is in doubt after the rib injury he suffered at the Indian Wells Masters.Barcelona Open Banc Sabadell@bcnopenbs dies!Només queda un mes per a tornar a veure als millors del món al #BCNOpenBS Rafa Nadal Stefanos Tsitsipas Jannik Sinner Carlos Alcaraz✍🏽 Ja estan inscrits per a aquesta edició del torneig. 18-24 d'abril @rctb1899 🎟 bit.ly/364PeUO2:30 AM · Mar 17, 20222123️⃣0️⃣ dies!Només queda un mes per a tornar a veure als millors del món al #BCNOpenBS✔️ Rafa Nadal✔️ Stefanos Tsitsipas✔️ Jannik Sinner✔️ Carlos Alcaraz✍🏽 Ja estan inscrits per a aquesta edició del torneig.📅 18-24 d'abril📍 @rctb1899 🎟 bit.ly/364PeUO https://t.co/VeAuEptjiBWTA 500 tournamentsCharleston Open - 4-10 AprilThis is the very first WTA 500 event of the month, with Aryna Sabalenka, Paula Badosa and Karolina Pliskova the top three seeds. Veronika Kudermetova won the tournament last year by beating Danka Kovinic.Porsche Tennis Grand Prix - 18-24 AprilSeveral top tennis players will compete in the 44th edition of the tournament. These include Iga Swiatek, Barbora Krejcikova and Paula Badosa.Ashleigh Barty won the competition last year by beating Sabalenka in the final. However, the Australian will not be defending her title, having announced her retirement from tennis a few weeks back.ATP Masters 1000 tournamentsMonte-Carlo Masters - 11-16 AprilNovak Djokovic will compete in the Monte Carlo MastersThis is the first Masters event of the claycourt season and several top tennis players will compete in the tournament. Rafael Nadal has withdrawn from the competition due to a rib injury, while Medvedev has been ruled out due to a hernia and Berrettini is recovering from right hand surgery.The likes of Novak Djokovic, Alexander Zverev, Casper Ruud and Carlos Alcaraz will challenge for the title. Stefanos Tsitsipas is the defending champion and Stan Wawrinka will continue his comeback as a wildcard.Sportskeeda Tennis@SK__TennisNovak Djokovic, Rafael Nadal & Dominic Thiem confirmed for Monte Carlo Masters; Roger Federer absent from entry list dlvr.it/RwCLnx7:23 AM · Mar 23, 2021Novak Djokovic, Rafael Nadal & Dominic Thiem confirmed for Monte Carlo Masters; Roger Federer absent from entry list dlvr.it/RwCLnxWTA 1000Madrid Open - 25 April - 2 MayThe women's competition in Madrid will be headlined by the likes of Iga Swiatek, Barbora Krejcikova and Paula Badosa.Billie Jean King CupThe qualifying round of this year's Billie Jean King Cup will take place on April 15 and 16. 16 countries will compete for eight places in the final. The matchups are as follows:Italy vs FranceUnited States vs UkraineCzech Republic vs Great BritainBelarus vs BelgiumKazakhstan vs GermanyCanada vs LatviaNetherlands vs SpainPoland vs RomaniaAlso Check Out: Charleston Open 2022 Schedule