failed to impress the Stuttgart board of directors. Basel Stuttgart therefore allowed Streller to rejoin his boyhood heroes FC Basel on a free transfer in June 2007. This was his fourth spell at the club and it turned out to be very successful. He was Basel's top goal-scorer during the 2007–08 season with twelve league goals and 16 goals in all competitions. In the last game of the season Valentin Stocker and Marco Streller scored the two goals in Basels 2–0 home win over BSC Young Boys and Basel won the championship. Streller missed the start of the 2008–09 season after returning from UEFA Euro 2008 injured. He playing his first game of the season in a 1–0 Swiss Cup win over FC Schötz on 20 September 2008. During the 2008–09 Swiss Super League season Streller played 23 league games, scoring six goals, but Basel finished just third in the League table, qualifying for the Europa League. In the 2009–10 season Streller played 29 League games, scoring 21 goals, and Basel won the Double. In the 2010–11 season Basel were able to defend the League Title, thus Streller won his fourth Swiss League Medal. For the 2011–12 Swiss Super League season trainer Thorsten Fink named Marco Streller as team captain. He scored his first UEFA Champions League goal for Basel on 22 November in the Group C tie in the Arena Națională, in Bucharest, as Basel won the away game against Oțelul Galați 3–2. At the end of the 2011–12 season, Streller won the Double, the League Championship title and the Swiss Cup with Basel. At the end of the 2012–13 Swiss Super League season Streller won the Championship title for the fourth time in a row and was Swiss Cup runner up with Basel. In the 2012–13 UEFA Europa League Basel advanced as far as the semi-finals, there being matched against the reigning UEFA Champions League holders Chelsea, but were knocked out being beaten 5–2 on aggregate. In a very long season Basel played a total of 76 games (36 in the domestic League, six in the Cup, 20 in Champions und Europa League, as well as 14 Test matches). Streller made 62 appearances, of which 32 were in der domestic League, three in the Cup and 17 in the Champions League and Europa League. On 18 September 2013, he headed the winning goal away to Chelsea in the