[5] Wallace made his debut in the 2004–05 season[5] against Kilmarnock in the Scottish Cup on 5 February 2005 and became a regular member of the first team squad although he found it hard to dislodge Takis Fyssas from the left back position.[8] Wallace was made Hearts vice-captain at the start of the 2010–11 season,[9] however, a month later while representing Scotland in a Euro 2012 qualifier against Liechtenstein, he suffered a cruciate ligament injury following a late challenge by Martin Stocklasa.[11] Wallace made his Rangers debut in the Champions League qualifier on 26 July 2011, in a 1–0 defeat, at the hands of Swedish side Malmo.[24] Wallace was officially appointed captain on a permanent basis prior to Rangers' 5–1 win over Alloa Athletic at Recreation Park on 16 August 2015.The match ended in a 3–2 win for opponents Hibernian,[26] whose supporters staged a pitch invasion at the final whistle; some Rangers players were confronted in the process of leaving the field, with Wallace a particular target due to his association with their Edinburgh derby rivals Hearts, and he appeared to be struck by at least one person during the disturbance.[30] Wallace missed a 2016–17 Scottish League Cup match against Peterhead on 9 August 2016, which ended a run of consecutive competitive appearances at 69 that had begun in February 2015.[33] Following a 4–0 defeat by Celtic in the 2017–18 Scottish Cup semi-finals, Wallace and teammate Kenny Miller were suspended by Rangers due to an alleged altercation with manager Graeme Murty.[36] In early September, he was not included in the Rangers squad for the 2018–19 UEFA Europa League group stage;[37] two days later, it was announced that he and Kenny Miller had won an appeal at a SPFL tribunal against the disciplinary action taken against them five months earlier, with the expectation they would make a financial claim against the club for the fines imposed.[46] Alongside Hearts team-mate Calum Elliot, Wallace was an integral part of the Scotland under-19 team that reached the final of the 2006 European Championships, where they lost 2–1 to Spain.[50] In August 2013, Rangers teammate David Templeton expressed his surprise at the omission of Wallace from the Scotland squad for the special challenge match with England.[51] Manager Ally McCoist urged Wallace to use being overlooked for the international at Wembley as motivation to push into future Scotland squads.[56] Wallace played in a 2018 World Cup qualifier against England at Wembley in November 2016, due to injuries to Robertson and Kieran Tierney.