Tenerife II

Background and foundation

Following various restructurings of the regional championships due to the growing number of clubs and the ongoing development of football in Spain, national competitions emerged at the expense of local ones. This led to the disappearance of most regional tournaments, except in the Canary Islands, where, due to mainland teams' reluctance to travel to the islands because of the long distance and high costs, local clubs were excluded and continued to compete in their own competition (Primera Categoría) divided by islands. It was not until June 1949 that the Royal Spanish Football Federation approved the inclusion of these clubs in national categories after an assembly on June 4, which recognized the Regional Championship as equivalent to the Tercera División. At the end of the 1949–50 season, the regional champions of Tenerife and Gran Canaria, Club Deportivo Tenerife and Unión Deportiva Las Palmas, competed for the single available Segunda División spot, which went to the Gran Canaria team.

The federation announced that at the end of the next season, the Tenerife regional champion would have another opportunity for promotion in a play-off against the 13th-placed team in Segunda División. This prompted a merger agreement in October 1950 between Iberia Fútbol Club and Club Deportivo Price to create the Unión Deportiva Tenerife, aiming to replicate Gran Canaria's successful model. To ensure Tenerife had a strong representative in national competitions, unifying efforts was necessary, gaining support through relevant meetings. The club was officially established on November 18, integrating all Tenerife clubs from the Primera Categoría. Club Deportivo Tenerife, Club Deportivo Norte, Real Hespérides, and Real Unión de Tenerife agreed to pursue a common goal, supporting the new team, which drew its best players from these clubs.

1950–51 season

On November 26, a tournament organized by the Tenerife Football Federation at the request of Unión Deportiva Tenerife was held at the Estadio Heliodoro Rodríguez López to identify the best players for its squad. Named the Torneo Relámpago for being held in a single day, it was won by Real Unión de Tenerife, which received a cup donated by the president of the Canary Islands Football Federation, Juan de la Rosa. Initially, there was consideration to skip the Tenerife Primera Categoría championship that season, but it was ultimately held. Unión won the tournament with one match remaining, three points ahead of Real Hespérides. This success further galvanized fan support for the promotion goal. The opponent in the promotion play-off was Levante Unión Deportiva.

The first leg was played on May 13, 1951, at Estadio Heliodoro Rodríguez López. Unión Deportiva won 1–0 with a goal by Lorencito in the 8th minute, though he missed a penalty in the second half that proved decisive. The Heliodoro recorded the highest attendance in Tenerife football history at the time. The return leg was held on May 27 at Estadio de Vallejo in Valencia. Levante overturned the tie with a 3–1 win, with goals from Joaquín Amat, Francisco Lahuera, and Carlos Moreno for the Valencians, and a goal by Pedrín in the 49th minute for Tenerife. Unión Deportiva Tenerife lost the tie 3–2 on aggregate and failed to gain promotion.

1951–52 season

The disappointment of failing to achieve promotion caused discouragement among fans and the club, weakening the project, reflected in Club Deportivo Tenerife's decision to compete independently again. Other clubs continued support despite no promotion opportunity the following season due to the lack of an available spot. The tournament, lacking the appeal of previous ones, was won by Club Deportivo Tenerife, followed by Club Deportivo Norte and Real Unión, third. Unión Deportiva, with squad changes, finished fifth and last with three points. Despite the announcement of a new promotion spot, collaboration agreements weakened, rendering the goal utopian.

1952–53 season

The 1952–53 Tenerife champion was to compete in a two-leg play-off against the 12th-placed team in Segunda División Group II, offering another chance for clubs to represent the province of Santa Cruz de Tenerife nationally. However, the Spanish Federation's requirement for a grass pitch to compete nationally, which the club lacked, complicated matters. Unable to afford national competition costs, Real Hespérides transferred its valid pitch—La Manzanilla—to Unión.

Due to the withdrawal of teams, the insular federation organized a tournament to determine promotion instead of the traditional championship. The Promotion Tournament was contested by three clubs after the exclusion of Hespérides and Real Unión. Club Deportivo Tenerife defeated the other two contenders and later Orihuela Deportiva in the promotion play-off, becoming the first Tenerife club to compete nationally. Following Club Deportivo Tenerife's promotion, Unión Deportiva dissolved, as its founding objective was achieved, albeit by another club.