In the first year, Vanney has help attract four professional teams (Real Salt Lake, Seattle Sounders FC, Colorado Rapids, and Vancouver Whitecaps FC) to the facility to host their preseason camps. In January 2011, Vanney joined Chivas USA as an assistant coach. Toronto FC Vanney got his first head coaching job in Major League Soccer when he became the ninth head coach for Toronto FC after Ryan Nelsen was dismissed on August 31, 2014, with 10 games remaining in the 2014 regular season. He inherited a 9–9–6 record. In his debut match, Toronto lost 1–0 to the Philadelphia Union. His first win came in a match that finished 3–0 against Chivas USA. He finished off the 2014 season in seventh place in the Eastern Conference with a record of two wins, six losses and two ties. Toronto were eliminated from the Canadian Championship during the 2015 season, although they qualified for the playoffs for the first time that season, after finishing sixth in the Eastern Conference. The club's rivals Montreal Impact eliminated Toronto in the knockout round. During the 2016 season, Toronto won the Canadian Championship and qualified for the playoffs after finishing in third place in the Eastern Conference. They got to the MLS Cup final where they lost in shoot-out 5–4 to Seattle Sounders following a goalless draw after extra-time. The arrival of Spanish playmaker Victor Vázquez in midfield at the beginning of the 2017 season saw less responsibility placed on the club's star forward Sebastian Giovinco and captain Michael Bradley to create Toronto's goalscoring opportunities, and this in turn freed up the Italian, enabling him to focus more on his attacking game; furthermore, Greg Vanney's switch in tactics from a 4–4–2 diamond to a 3–5–2 formation benefitted Giovinco's and Jozy Altidore's attacking partnership: by playing closer together, and with Vázquez now supporting them as the team's main creator, the attacking duo began to demonstrate a deeper understanding and an increased awareness of each other's movements, which improved their link-up play, and saw an increase in Altidore's goalscoring output throughout the season. On June 27, Toronto defeated Montreal 2–1 at home in the second leg of the 2017 Canadian Championship final to capture the title for the second consecutive season, edging Montreal 3–2 on aggregate. On September 30, 2017, Toronto FC captured the Supporters' Shield with a 4–2 home win over New York Red Bulls, to clinch top