Stadio Comunale Matusa was a multi-use stadium in Frosinone, Italy.
 It was used mostly for football matches and was the home ground of Frosinone Calcio — replaced by Stadio Benito Stirpe.
 The stadium holds 9,680.
Stadio Comunale Pasqualino Ferrante di Piedimonte Matese, shortened to Stadio Pasqualino Ferrante and known locally as simply Stadio di Sepicciano is a municipal stadium in Sepicciano, Piedimonte Matese, Italy.
 It is the home venue of Eccellenza Molise club Tre Pini Matese, Promozione Molise club F.W.P. Matese and Femminile Reg.
 Calcio 5 club Tre Pini Matese Femminile.
Stadio Comunale Riva IV is a football stadium in Chiasso, Ticino, Switzerland.
 It is the home ground of FC Chiasso and has a capacity of 4,000.
Stadio Gaetano Bonolis (formerly Stadio Comunale, also known as Stadio di Piano d'Accio) is a multi-use stadium in Teramo, Italy.
 It is currently used mostly for football matches and concerts.
 It is the home ground of Teramo Calcio.
 The stadium holds 7,498.
Stadio Città di Arezzo (formerly Stadio Comunale) is a multi-purpose stadium, located in Arezzo, Tuscany, Italy.
 It is used mostly for football matches and is the home of the U.S. Arezzo football club.
 It has a grass playing surface and a 13,128-seating capacity.
Unione Sportiva Fiumana or U.S. Fiumana was an Italian football club based in the present-day Croatian city of Rijeka.
 The club was active between 1926.
 and 1945., at the time when the city was part of Kingdom of Italy and was commonly referred to by its Italian name "Fiume".
 The club's home was the present-day Stadion Kantrida, which was at the time called "Stadio Comunale del Littorio".
FC Chiasso is a Swiss football club based in Chiasso.
 It was founded in 1905.
 Chiasso also played in the Italian first league between 1914 and 1923.
Stadio Comunale "Is Arenas" is a sports stadium in Quartu Sant'Elena, Sardinia, Italy.
 It is mostly used for football games and was the home venue of Serie A club Cagliari Calcio for the 2012–13 season.
U.S. Formia Calcio 1905 is an Italian association football located in Formia, Lazio.
 Its official colours are white and blue and plays its home matches at the Stadio Comunale di Maranola (Formia) since 2015.
 The team previously played at Stadio Nicola Perrone.
 Currently the club plays in the Eccellenza amateur regional division.
Stadio Tullio Saleri (formerly Nuovo Stadio Comunale) is a multi-use stadium in Lumezzane, Italy.
 It is currently used mostly for football matches and is the home ground of A.C. Lumezzane.
 The stadium holds 4,150.

Question: Which league used to include the club that plays in Stadio Comunale Riva IV?
Answer: Italian first league