Arsene Wenger expects to make progress this week in his attempts to strengthen his Arsenal squad following the humiliating FA Cup exit to Nottingham Forest.
Wenger made nine changes at the City Ground and his fringe players went down 4-2 to the mid-table Championship side.
The Frenchman criticised his team after the holders relinquished their grip on the trophy, with Wenger experiencing defeat at the third-round stage for the first time since taking charge of the north London club in 1996.
Wenger insists the Gunners, who last week signed Greek defender Konstantinos Mavropanos, will do further business during the transfer window in an effort to turn things around, but said no deals were imminent.
"I cannot give you any news on any transfer because we are not close to signing anybody," he said.
"We signed a Greek boy (Mavropanos) who looks quite good in training but apart from that, we have not done anything. Will we be out there to do something? Yes we will."
Asked whether there could be developments this week, Wenger said: "Yes, because we are in the second week of January and, after that, it passes quickly."
Wenger sat in the stands at the City Ground, serving the first of a three-game ban for his reaction to the controversial penalty awarded for a Calum Chambers handball by referee Mike Dean at The Hawthorns last week.
Dean has admitted he made a mistake with the award, according to Premier League referees chief Mike Riley.
Talking about the value of Video Assistant Referee (VAR) technology, which will be introduced to English football tonight in the FA Cup meeting of Brighton and Crystal Palace, Riley said:
"What is handball can look to you on the field of play if you get one look at it. But immediately there is evidence from another camera angle which shows actually the opposite happened. That is the safety net of the VAR.
"I think Chambers would have been overturned. The question you ask is, is it an act of deliberate handball? And the reverse angle shows him trying to bring his arm out of the way of the ball, rather than the reverse.
"I know Mike would have overturned it. He messages people, and he's a very honest guy, and he goes, 'I got it wrong'. He knows he did."