Sadigov is the most capped player in the history of Azerbaijan national team with 111 games[1] and captained the team since 2004 and he is widely recognized as one of the best players in the history of Azerbaijan, as he won the national league title six times and was selected as the footballer of the year six times.

After his comeback to Neftchi, Rashad won the national championship and cup and succeeded in passing the first qualification round of the Champions League with the black-and-whites.

[4] On 23 January 2009, Sadygov returned to the Turkish Süper Lig to join Kocaelispor on a six-month contract after he was kicked out from PFC Neftchi by the head coach Hans-Jürgen Gede in December 2008.

In July 2009, Sadigov briefly returned to FK Qarabağ to help them in UEFA Europa League and scored a magnificent goal against Rosenborg BK.

[6] As a result, he signed a one-year contract with Karabakh, after the club's impressive performance in the UEFA Europa League.

[9] However, following a string of injuries, he failed to get a regular place in Eskişehirspor's defence, which caused him to seek a new club.

[14] Sadigov made his Azerbaijan debut on 6 October 2001, against Sweden during 2002 FIFA World Cup qualification (UEFA).