Umar Sadiq Mesbah (born 2 February 1997) is a Nigerian professional footballer who plays as a striker for La Liga club Valencia, on loan from Real Sociedad, and the Nigeria national team.

Sadiq formerly represented the Nigeria national under-23 team and was an important member of the squad that won a bronze medal at the 2016 Summer Olympics.

[5] Shortly upon joining Spezia, Sadiq was loaned to Serie D side Lavagnese, making his senior debut in the final round of the 2013–14 season.

[7] Having bagged eight goals in his first three Primavera matches for Roma, Sadiq made his Serie A debut on 21 November, replacing Juan Iturbe after 88 minutes in a 2–2 away draw against Bologna.

He scored his first goal on 20 December, netting only seven minutes after coming on as an 82nd-minute substitute for Mohamed Salah, helping his team to a 2–0 home win over Genoa.

[10] He traveled with the first team to the United States for the 2017 International Champions Cup, scoring in his only appearance against Paris Saint-Germain, as Roma lost after penalties.

He subsequently scored the opener in an eventual 3–1 home win versus Turkish club Yeni Malatyaspor in the first leg of the Europa League third qualifying round.

[26] Three days later during Real Sociedad's La Liga fixture against Getafe Sadiq suffered Anterior cruciate ligament injury and was later ruled out of the season after undergoing surgery.

[27] At the start of the 2023–24 La Liga campaign, Sadiq returned to the pitch as Real Sociedad held Girona to a 1–1 draw.

In the 22nd minute, the Nigerian received the ball from Hamari Traoré in the middle of the pitch and went past two Sevilla players before unleashing an unstoppable shot into the top corner from outside of the box.