Sweden and Real Sociedad striker Alexander Isak has signed an extension of his contract with the Basque club and will take his deal until 2026.The 21-year-old has impressed with his domestic form the past two seasons and further fell in love with potential suitors with a promising show in Euro 2020 with Sweden.Many of Europe's top clubs have been linked with the striker, including Liverpool, Manchester United, Real Madrid and Barcelona. However, such clubs' hopes of signing the player at any time have soon been dashed, with…