Tuchel has agreed an 18-month contract with the option of another year, the west London club announced.
The 56-year-old Portuguese returns to management for the first time since being sacked by Manchester United in December, and replaces Mauricio Pochettino, who was sacked on Tuesday.
Roma teenager Afena-Gyan plays down apparent racist remark.
Both sides created chances in the first half but it was SCEB who converted them and deservedly headed into the break with a two-goal cushion.
United youth product Gomes, 18, struck after Spurs' Lucas Moura cancelled out Anthony Martial's first-half opener and gave the 20-time Premier League champions another victory after they beat Perth Glory, Leeds United and Inter Milan.
Tottenham Hotspur manager Mauricio Pochettino was angry after his side surrendered the lead for the second straight week in a 1-1 Premier League draw at in-form Leicester City on Saturday.
Under-fire Manchester United boss Jose Mourinho has been priced odds-on to be the first Premier League manager to leave his job this season.
Jose Mourinho will be desperate to prove he is not past his best after being sacked by Chelsea and Manchester United.
PSG made hard work of beating Strasbourg 4-2 in the French Ligue 1, while Real Madrid registered a comfortable 4-1 win away to Alaves in their opening game.
Tottenham manager Mauricio Pochettino is readying his squad for a final tilt at the Premier League title, aware that he can ask his players to remain focused on one game at a time when a bulk of them return from the international break.
Riyad Mahrez struck twice as Manchester City reached the Champions League final for the first time thanks to a 2-0 victory over Paris St Germain at the Etihad Stadium on Tuesday that secured a 4-1 aggregate win.
Following is reaction to the sacking of Manchester United manager Jose Mourinho, who was dismissed by the Premier League club on Tuesday.
Lionel Messi was at the top of his game as Barcelona earned a 3-2 win at Athletic Bilbao on Wednesday to move up to third in La Liga.
Pochettino picks Barcelona as favourites to win Champions League
Spurs' triumph at the Etihad Stadium moved them within two points of Premier League leaders Leicester City and kept them in second place above Arsenal on goal difference with 12 matches to play
Mauricio Pinilla converted a late penalty to give Atalanta a 2-1 win over Inter Milan and condemn their troubled opponents to a third successive Serie A defeat on Sunday.
News of all that's transpired on and off the football field
Spurs sacked Mauricio Pochettino on Tuesday before entrusting Mourinho with the task of reviving their fortunes.
Round-up of football matches played around Europe on Saturday.
Images from the World Cup pre-quarterfinal match between Brazil and Chile at Belo Horizonte.
PSG make winning start as Messi arrival looms
A round-up of Sunday's action in the South American World Cup qualifiers.
Here is some reaction to the return of the Portuguese manager to club soccer after being dismissed by Manchester United last December:
Video footage showed Tottenham's Eric Dier climbing over seats and confronting a home fan before he was restrained by security guards and other fans. He was eventually led away.
His goal completed a comeback after Cristiano Ronaldo put Juventus 2-1 in front.
Chile bundled reigning champions Uruguay out of the Copa America with a 1-0 victory.
Tottenham Hotspur showed the English Premier League title race might not be just a two-horse affair with a hugely impressive 6-2 win at Everton.
The Portuguese won the Europa League and League Cup in two full seasons at Manchester United but was sacked midway through the last campaign with the club sixth in the Premier League.
With dreams of European glory in tatters, Manchester United, Chelsea and Tottenham Hotspur turn their attention to the FA Cup quarter-finals this weekend clinging to their last chance of silverware this season.
Southampton delivered a huge blow to the Premier League survival hopes of their former boss Nigel Adkins and his Reading team when they beat them 2-0 at the Madejski Stadium on Saturday to leave the hosts rooted to the foot of the table.
Cristiano Ronaldo scored a perfect hat-trick inside 32 minutes as Juventus bounced back from their midweek Champions League exit by beating Cagliari 3-1 away in Serie A on Sunday.
An early Mohamed Salah penalty and a late strike by Divock Origi gave Liverpool a 2-0 win over Tottenham Hotspur in Saturday's all-English Champions League final
De Boer, who lasted only 77 days as Crystal Palace manager after losing his first four league games in charge with no goals scored, said in an interview on BT Sport that it was "a pity" Mourinho was Rashford's manager because he was not getting enough chances.
Images from the UEFA Champions League matches played on Tuesday night.
Southampton threw up a defensive wall around both their goal and their new Argentine manager on Monday, repelling a high-flying Everton side as well as a threatened fans' protest at St Mary's.
Southampton manager Mauricio Pochettino began his reign at the struggling Premier League club with an impressive 0-0 draw against fifth-placed Everton on Monday, three days after taking over from the sacked Nigel Adkins.
Substitute Alessandro Matri struck twice, including a winner in stoppage time, as Serie A leaders Juventus hit back to win 3-1 at 10-man Cagliari on Friday.
Manchester City's Premier League title defence fell apart at the seams in a 3-1 defeat to Southampton on Saturday when goalkeeper Joe Hart committed a howler and Gareth Barry scored a bizarre own goal.
Barack Obama and Michelle showed off their moves at the end of a state dinner in Argentina.
Tottenham Hotspur's France goalkeeper Hugo Lloris has signed a new contract that will take him through to 2022, the Premier League club said on Thursday. The 29-year-old, who captains club and country, has made 189 appearances for Spurs since joining from Olympique Lyonnais in 2012 for a fee of about 12 million pounds ($14.81 million). "I'm very pleased with this new contract," Lloris told the club website
