Tottenham have checked on Besiktas striker Cenk Tosun.
The 26-year-old was the subject of offers from Crystal Palace and Newcastle at the end of the transfer window.
The Turkish club want £17.5m for the forward, who scored in Besiktas' impressive 3-1 win over Porto in the Champions League last week.
The Super Lig outfit were willing to accept offers in the region of £12m for Tosum earlier in the summer, but his performances already this season in an inflated market means his price has risen.
The striker scored 27 goals last season as Besiktas retained their domestic title.
Regarding Newcastle and Palace's interest, Tosun was quoted telling Turkish-Football in the summer: 'Crystal Palace offered €13.5 million on transfer deadline day.
'Had they made the bid a week earlier I would be playing in the Premier league right now.
'I would only leave Besiktas if I made my club money and if the circumstances are right.
'Now I'm focused on winning my third consecutive league title, playing Champions League football and focusing on international football.'