Martin Tony Waikwa Olsson (born 17 May 1988) is a Swedish professional footballer who plays as a left back for Malmö FF and the Sweden national team.

A full international since 2010, Olsson has won more than 50 caps for the Sweden national team and has represented his country at UEFA Euro 2012 and 2016 as well as the 2018 FIFA World Cup.

[citation needed] He made his Blackburn debut in the UEFA Cup qualifier in the 2007–08 season as a late substitution for Stephen Warnock.

[4][5] He made his Premier League debut against Derby County in a 2–1 victory on 30 December 2007, coming on as an 84th-minute substitute for Morten Gamst Pedersen at Pride Park, in front of a crowd of 30,048 spectators and the referee was Peter Walton.

He featured in Rovers' opening 2010–11 Premier League match against Everton at Ewood Park on 14 August 2010, playing the full 90 minutes on the left-wing in a 1–0 victory.

On 12 February 2011, Olsson made his 50th Premier League appearance for the club when he started at left-back against Newcastle United playing the full 90 minutes in a 0–0 draw.

On 22 May, Olsson started and played the full 90 minutes against Wolverhampton Wanderers in a 3–2 win at Molineux which kept both teams up for another season in the Premier League.

After helping Sweden qualify for UEFA Euro 2012, Olsson returned from international duty to put in a Man of the Match performance on the left wing against Queens Park Rangers in a 1–1 draw at Loftus Road.

At the end of the season, Olsson made 31 appearances in all competitions for Rovers as they were relegated after finishing in 19th place in the Premier League with just 31 points to their name.

[10][11] After picking up a minor injury in pre-season, Olsson made his comeback as an unused substitute on 28 August, against Milton Keynes Dons at Stadium mk in a 2–1 defeat as Blackburn were knocked out in the second round of the League Cup.

[17] On 18 August, Olsson's ban was extended by a further three matches after the FA found him guilty of improper conduct, which Norwich announced they would not contend.

Olsson played in all three matches including the 2–0 victory over Middlesbrough in the final at Wembley Stadium, which saw Norwich return to the Premier League at the first attempt.

[32] This meant that Olsson was set for a fourth Premier League relegation, same as Robert Green and former Norwich teammate Sébastien Bassong, but one off the current record holders Hermann Hreiðarsson and Nathan Blake.

[39] On 3 March 2024, during the final game of the Swedish Cup group stage, Varberg forward Yusuf Abdulazeez was shown a second yellow and subsequently a red card after a tackle on Derek Cornelius.

[45][46][47] On 6 September 2011, he made his first start for the national team, playing at left back, and scored Sweden's third goal in the 81st minute of the 5–0 victory over San Marino after a clever reverse pass by Zlatan Ibrahimović in a Group E Euro 2012 qualifying fixture.

Controversial agent Rune Hauge has also worked for Olsson, after being introduced to him by former Blackburn Rovers teammate Morten Gamst Pedersen.