Luka Vušković completed a £46 million move to Brighton & Hove Albion in July, one of the most eye-catching sales of a turbulent summer for Tottenham.
Since then, the two clubs' fortunes have diverged sharply. Tottenham have taken just two points from their opening five Premier League matches despite investing heavily in the squad, bringing in Sandro Tonali, 26, from Newcastle United and Mateus Fernandes, 21, from West Ham United among their arrivals.
Vušković, meanwhile, has quickly established himself at Brighton, who sit third in the table with 10 points from five matches after last weekend's 3-0 win over Arsenal.
The 19-year-old spent last season on loan at Bundesliga side Hamburger SV, making 30 appearances and scoring six goals in a spell that raised expectations he would break into Tottenham's first team. Instead, the north London club opted to cash in and sell him to a Premier League rival rather than hand him regular senior football.
Vušković insists he bears no ill will towards his former employers.
"I don't think about it too much. I appreciate that Tottenham noticed me as a very young player. They invested in me, and during our time together we found good solutions where I could play and develop," he told Sportske Novosti.
Vušković has started every Premier League fixture for his new club and scored his first goal for Brighton in a 1-1 draw with Leeds United earlier this month, having previously been limited to pre-season and cup appearances during his time at Tottenham.
Brighton head coach Fabian Hürzeler has been careful to manage expectations around the teenager, stressing publicly that he would need time to adjust to English football's top flight despite the weight of the transfer fee involved.
Tottenham, by contrast, sit bottom of the Premier League after five games without a win, a stark reversal from the optimism that greeted their summer spending just months ago.
Tottenham did, however, negotiate a 20 percent sell-on clause and matching rights as part of the sale, meaning any future rise in Vušković's value could yet benefit the club he left behind.