By Harshita Mary VargheseJuly 23 (Reuters) - Comcast's Peacock streaming service reported its first quarterly profit on Thursday, as the soccer World Cup and the hit reality ‌show "Love Island USA" attracted more subscribers. The $189 million pre-tax profit marks a major win ‌for the streaming service. The service streamed Telemundo's Spanish-language coverage of FIFA World Cup matches, whose viewership benefited from prime-time kickoffs in the United States. Pre-tax profit from the unit ​fell 5.1%, with revenue of $2.41 ‌billion slightly below estimates. Total revenue of $29.94 billion and adjusted profit of $1.04 per share ​beat estimates, according to data compiled by LSEG.