Hazard began his professional career at Lens in Ligue 1, and moved to Chelsea in 2012 shortly after they had signed his older brother, Eden.Having previously played at every level in the Belgian national youth team system, he was handed his first senior international cap against the United States in May 2013.Similar to his brother's move to Lille, his parents accepted an offer from Lens with the hope that the training facilities in France would be better, here he met fellow Belgium player and future Chelsea teammate Charly Musonda.[14] Hazard's father later admitted Eden was much better than Thorgan, and that joining clubs in the North of France was the best solution, stating, "They remained so close to home and, at the same time, they integrated at structures where they could grow, because in Belgium, unfortunately, it's a little empty for the training of youth."[15] While in the club's youth academy, Hazard played for the Lens under-16 team, alongside players such as Geoffrey Kondogbia and Raphaël Varane, that won the 2008–09 edition of the Championnat National des 16 ans 44.[20] He made his professional debut in Lens' opening league match of the season against Reims, appearing as a second-half substitute in a 2–0 defeat.[citation needed] On 24 July 2012, Chelsea confirmed on its website the club had agreed terms with Lens for the transfer of Hazard, soon after the signing of his brother Eden from Lille.[22][23] He made his debut on 17 August 2012 in an Under-21 Premier League match, a 0–0 home draw against Manchester City in what was to be his only appearance in Chelsea colours before leaving the club.[29] On 16 May 2013, Hazard put in an impressive shift as he scored the game's opening goal from the penalty spot before providing two assists in a 5–2 defeat of Club Brugge at the Regenboogstadion in Waregem.In the 3–1 win against FC 08 Homburg in the DFB-Pokal 16 August 2014, Hazard made his debut, coming on in the 78th minute as a substitute for Branimir Hrgota.[39] Hazard scored twice in Gladbach's 7–0 win over FK Sarajevo in the UEFA Europa League play-offs on 28 August 2014, including a curling free-kick from 35 yards out.[40][41] On 24 September 2014, Hazard made his first start for Borussia Mönchengladbach in the Bundesliga, against Hamburger SV, playing 71 minutes before being substituted for Fabian Johnson in a 1–0 win.[45] During an interview about his move becoming permanent in the summer, Hazard confirmed his deal does contain a buy-back clause and that he still dreams of returning to Stamford Bridge in the future.[47] Following the resignation of manager Lucien Favre, who lost the first five matches of the Bundesliga, and André Schubert's appointment, he was unable to find a place in the starting lineup.[50] Looking to improve his playing time and goalscoring heading into the year,[51] Hazard scored his first ever hat-trick in a 6–1 victory over Swiss club Young Boys in the second leg of the UEFA Champions League play-off round on 24 August 2016.[59] On 19 August 2018, Hazard, Alassane Pléa and Raffael each scored hat-tricks in an 11–1 win at fifth-tier BSC Hastedt in the first round of the cup.[citation needed] On 6 September 2023, Hazard joined Belgian Pro League club Anderlecht on a three-year contract,[67] for a reported fee of €4 million.[citation needed] Due to his increased participation with Lens domestically, Hazard primarily played in competitive matches with the under-17 team under coach Bob Browaeys.[83] On 16 May 2013, Hazard earned his first senior call-up after being included in Marc Wilmots' 28-man squad ahead of a friendly with the United States followed by a 2014 FIFA World Cup qualifier against Serbia.[84] On 29 May, he made his senior international debut for Belgium as a second-half substitute for Chelsea teammate Romelu Lukaku in the 4–2 friendly win over the United States.