Robert Dante Siboldi Badiola (born 24 September 1965) is a Uruguayan professional manager and former footballer.

A talented goalkeeper, Siboldi played most of his club career in Mexico and for the Uruguay national team between 1992-1997.

As a manager, Siboldi has been Liga MX champion twice, with Santos Laguna and Tigres UANL, respectively, in only three playoffs disputed. Both of his Liga MX championships were as interim coach.

Siboldi played professional club football in Uruguay, Argentina, Mexico, and Colombia.

In Mexico, he played for Atlas, Cruz Azul, Puebla, and UANL Tigres.

He arrived to Tigres in 1995, a season in which the team was relegated to Primera División A. Siboldi chose to stay, and was instrumental in returning the team to First Division within the year. He became an idol between the fans of the team. He played for Tigres until 1999.

Siboldi made his international debut on June 21, 1992, in a friendly against Australia (2-0). He obtained a total number of 34 international caps for the Uruguay national football team.

Siboldi was announced on May 4, 2009, as the new Cruz Azul coach, replacing Benjamin Galindo.

On August 8, 2018, Santos Laguna announced they had accepted Siboldi's resignation after a conflict with a player.^[1][2]

On 19 April 2021, Club Tijuana announced that Siboldi would take over the club after former coach Pablo Guede resigned following a 3-2 loss against Mazatlan FC. On 29 September 2021, Club Tijuana announced that Siboldi would no longer be the coach for Club Tijuana leaving the club after 5 months in charge following a 3-0 loss against Club Necaxa the day before.^[3]

On 5 March 2022, Siboldi was appointed as the manager of Saudi Arabian club Al-Ahli.^[4] He was sacked on 4 September 2022.^[5] He got the club relegated to the First Division for the first time in its history.

On 10 April 2023, Siboldi arrived to Tigres UANL as head coach, team where he played and became an idol in the 1990s. He took on the team after their second coach got sacked after losing 1-2 to Mazatlán, a team that only won 3 games in the Clausura 2023 season. When Siboldi took over, he tied his first game against Querétaro, won the second against Puebla 1-0 and lost to León 3-0. He went on to defeat Puebla in the "repechaje" of the liguilla (playoffs) by 1-0, setting the team against Toluca in quarterfinals. They won the home game 4-1, and lost the away game to 3-1, with a final score of 5-4 Tigres reached seminalfinals. On seminalfinals, they faced city rival Monterrey, team that finished the regular season as leader with 40 points out of 51 possible, winning 13 games and losing only 3. Tigres and Monterrey tied 0-0 in the first leg. In the second game, Tigres won by 0-1. Set in the finals, Tigres faced Guadalajara. The teams tied in the first leg by 0-0. In the second leg, Tigres was losing by 2-0 in the first half. By the second half the team tied 2-2. Tigres scored the 3-2 in overtime and became champion. On 4 June 2024, Siboldi was dismissed from his position.^[6]

Peñarol

• Uruguayan Primera División: 1985, 1986
• Copa Libertadores: 1987

Tigres UANL

• Liga de Ascenso de México: Invierno 1996, Verano 1997
• Copa México: 1995–96

Individual

• Mexican Primera División Golden Glove: 1989–90

Cruz Azul Jasso

• Segunda División de México: Clausura 2007

Santos Laguna

• Liga MX: Clausura 2018

Cruz Azul

• Leagues Cup: 2019

Tigres UANL

• Liga MX: Clausura 2023
• Campeón de Campeones: 2023
• Campeones Cup: 2023

Individual

• Liga MX Manager of the Tournament: 2017–18

• Robert Siboldi at Official Liga MX Profile
• Robert Siboldi at Soccerway
• Profile at Tenfield (in Spanish)
• Argentine Primera Statistics at Fútbol XXI^[usurped] (in Spanish)